diff --git a/app/controllers/admins_group_managers/admins_group_manager_controller.rb b/app/controllers/admins_group_managers/admins_group_manager_controller.rb
deleted file mode 100644
index fad6629e3..000000000
--- a/app/controllers/admins_group_managers/admins_group_manager_controller.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-module AdminsGroupManagers
-  class AdminsGroupManagerController < ApplicationController
-    before_action :authenticate_admins_group_manager!
-
-    def nav_bar_profile
-      :admins_group_manager
-    end
-  end
-end
diff --git a/app/controllers/admins_group_managers/admins_groups_controller.rb b/app/controllers/admins_group_managers/admins_groups_controller.rb
deleted file mode 100644
index 3e599883a..000000000
--- a/app/controllers/admins_group_managers/admins_groups_controller.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-module AdminsGroupManagers
-  class AdminsGroupsController < AdminsGroupManagerController
-    def index
-      @admins_groups = admins_groups
-    end
-
-    private
-
-    def admins_groups
-      admins_group_ids = current_admins_group_manager.admins_group_ids
-      AdminsGroup.where(id: admins_group_ids.compact.uniq)
-    end
-  end
-end
diff --git a/app/controllers/manager/admins_group_managers_controller.rb b/app/controllers/manager/admins_group_managers_controller.rb
deleted file mode 100644
index f580748e1..000000000
--- a/app/controllers/manager/admins_group_managers_controller.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-module Manager
-  class AdminsGroupManagersController < Manager::ApplicationController
-  end
-end
diff --git a/app/controllers/manager/admins_groups_controller.rb b/app/controllers/manager/admins_groups_controller.rb
deleted file mode 100644
index ebb92784c..000000000
--- a/app/controllers/manager/admins_groups_controller.rb
+++ /dev/null
@@ -1,32 +0,0 @@
-module Manager
-  class AdminsGroupsController < Manager::ApplicationController
-    def add_admins_group_manager
-      emails = (params['emails'].presence || '').split(',').to_json
-      emails = JSON.parse(emails).map { EmailSanitizableConcern::EmailSanitizer.sanitize(_1) }
-
-      admins_group_managers, invalid_emails = admins_group.add_admins_group_managers(emails:)
-
-      if invalid_emails.present?
-        flash[:alert] = t('.wrong_address',
-          count: invalid_emails.size,
-          emails: invalid_emails)
-      end
-
-      if admins_group_managers.present?
-        flash[:notice] = "Les gestionnaires ont bien été affectés au groupe d'administrateurs"
-
-        AdminsGroupMailer
-          .notify_added_admins_group_managers(admins_group, admins_group_managers, current_super_admin.email)
-          .deliver_later
-      end
-
-      redirect_to manager_admins_groups_path(admins_group)
-    end
-
-    private
-
-    def admins_group
-      @admins_group ||= AdminsGroup.find(params[:id])
-    end
-  end
-end
diff --git a/app/controllers/manager/groupe_gestionnaires_controller.rb b/app/controllers/manager/groupe_gestionnaires_controller.rb
index 612f5e66a..68a03603c 100644
--- a/app/controllers/manager/groupe_gestionnaires_controller.rb
+++ b/app/controllers/manager/groupe_gestionnaires_controller.rb
@@ -20,7 +20,25 @@ module Manager
           .deliver_later
       end
 
-      redirect_to manager_groupe_gestionnaires_path(groupe_gestionnaire)
+      redirect_to manager_groupe_gestionnaire_path(groupe_gestionnaire)
+    end
+
+    def remove_gestionnaire
+      if !groupe_gestionnaire.root_groupe_gestionnaire? || groupe_gestionnaire.gestionnaires.one?
+        flash[:alert] = "Suppression impossible : il doit y avoir au moins un gestionnaire dans le groupe racine"
+      else
+        gestionnaire = Gestionnaire.find(gestionnaire_id)
+        if groupe_gestionnaire.remove(gestionnaire)
+          flash[:notice] = "Le gestionnaire « #{gestionnaire.email} » a été retiré du groupe."
+          GroupeGestionnaireMailer
+            .notify_removed_gestionnaire(groupe_gestionnaire, gestionnaire, current_super_admin.email)
+            .deliver_later
+        else
+          flash[:alert] = "Le gestionnaire « #{gestionnaire.email} » n’est pas dans le groupe."
+        end
+      end
+
+      redirect_to manager_groupe_gestionnaire_path(groupe_gestionnaire)
     end
 
     private
@@ -28,5 +46,9 @@ module Manager
     def groupe_gestionnaire
       @groupe_gestionnaire ||= GroupeGestionnaire.find(params[:id])
     end
+
+    def gestionnaire_id
+      params[:gestionnaire][:id]
+    end
   end
 end
diff --git a/app/dashboards/admins_group_dashboard.rb b/app/dashboards/admins_group_dashboard.rb
deleted file mode 100644
index 223d15a43..000000000
--- a/app/dashboards/admins_group_dashboard.rb
+++ /dev/null
@@ -1,54 +0,0 @@
-require "administrate/base_dashboard"
-
-class AdminsGroupDashboard < Administrate::BaseDashboard
-  # ATTRIBUTE_TYPES
-  # a hash that describes the type of each of the model's fields.
-  #
-  # Each different type represents an Administrate::Field object,
-  # which determines how the attribute is displayed
-  # on pages throughout the dashboard.
-  ATTRIBUTE_TYPES = {
-    id: Field::Number,
-    name: Field::String,
-    created_at: Field::DateTime,
-    updated_at: Field::DateTime,
-    admins_group_managers: Field::HasMany,
-    administrateurs: Field::HasMany
-  }.freeze
-
-  # COLLECTION_ATTRIBUTES
-  # an array of attributes that will be displayed on the model's index page.
-  #
-  # By default, it's limited to four items to reduce clutter on index pages.
-  # Feel free to add, remove, or rearrange items.
-  COLLECTION_ATTRIBUTES = [
-    :id,
-    :created_at,
-    :name,
-    :admins_group_managers,
-    :administrateurs
-  ].freeze
-
-  # SHOW_PAGE_ATTRIBUTES
-  # an array of attributes that will be displayed on the model's show page.
-  SHOW_PAGE_ATTRIBUTES = [
-    :admins_group_managers,
-    :administrateurs,
-    :id,
-    :created_at
-  ].freeze
-
-  # FORM_ATTRIBUTES
-  # an array of attributes that will be displayed
-  # on the model's form (`new` and `edit`) pages.
-  FORM_ATTRIBUTES = [
-    :name
-  ].freeze
-
-  # Overwrite this method to customize how users are displayed
-  # across all pages of the admin dashboard.
-  #
-  def display_resource(admins_group)
-    admins_group.name
-  end
-end
diff --git a/app/dashboards/admins_group_manager_dashboard.rb b/app/dashboards/admins_group_manager_dashboard.rb
deleted file mode 100644
index 09a8c8c20..000000000
--- a/app/dashboards/admins_group_manager_dashboard.rb
+++ /dev/null
@@ -1,57 +0,0 @@
-require "administrate/base_dashboard"
-
-class AdminsGroupManagerDashboard < Administrate::BaseDashboard
-  # ATTRIBUTE_TYPES
-  # a hash that describes the type of each of the model's fields.
-  #
-  # Each different type represents an Administrate::Field object,
-  # which determines how the attribute is displayed
-  # on pages throughout the dashboard.
-  ATTRIBUTE_TYPES = {
-    id: Field::Number,
-    user: Field::HasOne.with_options(searchable: true, searchable_field: 'email'),
-    created_at: Field::DateTime,
-    updated_at: Field::DateTime,
-    admins_groups: Field::HasMany.with_options(limit: 20),
-    registration_state: Field::String.with_options(searchable: false),
-    email: Field::Email.with_options(searchable: false)
-  }.freeze
-
-  # COLLECTION_ATTRIBUTES
-  # an array of attributes that will be displayed on the model's index page.
-  #
-  # By default, it's limited to four items to reduce clutter on index pages.
-  # Feel free to add, remove, or rearrange items.
-  COLLECTION_ATTRIBUTES = [
-    :id,
-    :user,
-    :created_at,
-    :admins_groups,
-    :registration_state
-  ].freeze
-
-  # SHOW_PAGE_ATTRIBUTES
-  # an array of attributes that will be displayed on the model's show page.
-  SHOW_PAGE_ATTRIBUTES = [
-    :id,
-    :user,
-    :created_at,
-    :updated_at,
-    :registration_state,
-    :admins_groups
-  ].freeze
-
-  # FORM_ATTRIBUTES
-  # an array of attributes that will be displayed
-  # on the model's form (`new` and `edit`) pages.
-  FORM_ATTRIBUTES = [
-    :email
-  ].freeze
-
-  # Overwrite this method to customize how users are displayed
-  # across all pages of the admin dashboard.
-  #
-  def display_resource(admins_group_manager)
-    admins_group_manager.email
-  end
-end
diff --git a/app/mailers/admins_group_mailer.rb b/app/mailers/admins_group_mailer.rb
deleted file mode 100644
index 03e552a1b..000000000
--- a/app/mailers/admins_group_mailer.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class AdminsGroupMailer < ApplicationMailer
-  layout 'mailers/layout'
-
-  def notify_added_admins_group_managers(admins_group, added_admins_group_managers, current_super_admin_email)
-    added_admins_group_manager_emails = added_admins_group_managers.map(&:email)
-    @admins_group = admins_group
-    @current_super_admin_email = current_super_admin_email
-
-    subject = "Vous avez été ajouté(e) en tant que gestionnaire du groupe d'administrateur \"#{admins_group.name}\""
-
-    mail(bcc: added_admins_group_manager_emails, subject: subject)
-  end
-end
diff --git a/app/mailers/groupe_gestionnaire_mailer.rb b/app/mailers/groupe_gestionnaire_mailer.rb
index 1ec583139..b5c4debac 100644
--- a/app/mailers/groupe_gestionnaire_mailer.rb
+++ b/app/mailers/groupe_gestionnaire_mailer.rb
@@ -1,6 +1,14 @@
 class GroupeGestionnaireMailer < ApplicationMailer
   layout 'mailers/layout'
 
+  def notify_removed_gestionnaire(groupe_gestionnaire, removed_gestionnaire, current_super_admin_email)
+    @groupe_gestionnaire = groupe_gestionnaire
+    @current_super_admin_email = current_super_admin_email
+    subject = "Vous avez été retiré(e) du groupe d'administrateur \"#{groupe_gestionnaire.name}\""
+
+    mail(to: removed_gestionnaire.email, subject: subject)
+  end
+
   def notify_added_gestionnaires(groupe_gestionnaire, added_gestionnaires, current_super_admin_email)
     added_gestionnaire_emails = added_gestionnaires.map(&:email)
     @groupe_gestionnaire = groupe_gestionnaire
diff --git a/app/models/admins_group.rb b/app/models/admins_group.rb
deleted file mode 100644
index e828e419b..000000000
--- a/app/models/admins_group.rb
+++ /dev/null
@@ -1,30 +0,0 @@
-class AdminsGroup < ApplicationRecord
-  belongs_to :admins_group, optional: true # parent
-  has_many :children, class_name: "AdminsGroup", inverse_of: :admins_group
-  has_many :administrateurs
-  has_and_belongs_to_many :admins_group_managers
-
-  def add(admins_group_manager)
-    admins_group_managers << admins_group_manager
-  end
-
-  def add_admins_group_managers(ids: [], emails: [])
-    admins_group_managers_to_add, valid_emails, invalid_emails = AdminsGroupManager.find_all_by_identifier_with_emails(ids:, emails:)
-    not_found_emails = valid_emails - admins_group_managers_to_add.map(&:email)
-
-    # Send invitations to users without account
-    if not_found_emails.present?
-      admins_group_managers_to_add += not_found_emails.map do |email|
-        user = User.create_or_promote_to_admins_group_manager(email, SecureRandom.hex)
-        user.invite_admins_group_manager!(self)
-        user.admins_group_manager
-      end
-    end
-
-    # We dont't want to assign a user to an admins_group if they are already assigned to it
-    admins_group_managers_to_add -= admins_group_managers
-    admins_group_managers_to_add.each { add(_1) }
-
-    [admins_group_managers_to_add, invalid_emails]
-  end
-end
diff --git a/app/models/admins_group_manager.rb b/app/models/admins_group_manager.rb
deleted file mode 100644
index cb11b1bd3..000000000
--- a/app/models/admins_group_manager.rb
+++ /dev/null
@@ -1,41 +0,0 @@
-class AdminsGroupManager < ApplicationRecord
-  has_and_belongs_to_many :admins_groups
-
-  belongs_to :user
-
-  delegate :email, to: :user
-
-  default_scope { eager_load(:user) }
-
-  def self.by_email(email)
-    find_by(users: { email: email })
-  end
-
-  def self.find_all_by_identifier(ids: [], emails: [])
-    find_all_by_identifier_with_emails(ids:, emails:).first
-  end
-
-  def self.find_all_by_identifier_with_emails(ids: [], emails: [])
-    valid_emails, invalid_emails = emails.partition { URI::MailTo::EMAIL_REGEXP.match?(_1) }
-
-    [
-      where(id: ids).or(where(users: { email: valid_emails })).distinct(:id),
-      valid_emails,
-      invalid_emails
-    ]
-  end
-
-  def can_be_deleted?
-    !(root_admins_group = admins_groups.where(admins_group: nil).first) || root_admins_group.admins_group_managers.size > 1
-  end
-
-  def registration_state
-    if user.active?
-      'Actif'
-    elsif user.reset_password_period_valid?
-      'En attente'
-    else
-      'Expiré'
-    end
-  end
-end
diff --git a/app/models/groupe_gestionnaire.rb b/app/models/groupe_gestionnaire.rb
index 526418d37..aca1491d7 100644
--- a/app/models/groupe_gestionnaire.rb
+++ b/app/models/groupe_gestionnaire.rb
@@ -4,10 +4,24 @@ class GroupeGestionnaire < ApplicationRecord
   has_many :administrateurs
   has_and_belongs_to_many :gestionnaires
 
+  def root_groupe_gestionnaire?
+    groupe_gestionnaire.nil?
+  end
+
   def add(gestionnaire)
+    return if gestionnaire.nil?
+    return if in?(gestionnaire.groupe_gestionnaires)
+
     gestionnaires << gestionnaire
   end
 
+  def remove(gestionnaire)
+    return if gestionnaire.nil?
+    return if !in?(gestionnaire.groupe_gestionnaires)
+
+    gestionnaire.groupe_gestionnaires.destroy(self)
+  end
+
   def add_gestionnaires(ids: [], emails: [])
     gestionnaires_to_add, valid_emails, invalid_emails = Gestionnaire.find_all_by_identifier_with_emails(ids:, emails:)
     not_found_emails = valid_emails - gestionnaires_to_add.map(&:email)
diff --git a/app/views/admins_group_mailer/notify_added_admins_group_managers.html.haml b/app/views/admins_group_mailer/notify_added_admins_group_managers.html.haml
deleted file mode 100644
index 40c1190a3..000000000
--- a/app/views/admins_group_mailer/notify_added_admins_group_managers.html.haml
+++ /dev/null
@@ -1,6 +0,0 @@
-%p= t(:hello, scope: [:views, :shared, :greetings])
-
-%p
-  = t(".email_body", admins_group_name: @admins_group.name, email: @current_super_admin_email, application_name: APPLICATION_NAME)
-
-= render partial: "layouts/mailers/signature"
diff --git a/app/views/admins_group_managers/admins_groups/index.html.haml b/app/views/admins_group_managers/admins_groups/index.html.haml
deleted file mode 100644
index fc9fb0924..000000000
--- a/app/views/admins_group_managers/admins_groups/index.html.haml
+++ /dev/null
@@ -1,17 +0,0 @@
-= render partial: 'admins_group_managers/breadcrumbs',
-  locals: { steps: [['Groupes d\'administrateurs', admins_group_manager_admins_groups_path]] }
-
-#admins_groups-index.container
-  %h1.fr-h1 Liste des groupes d'administrateurs
-
-  %table.fr-table.width-100.mt-3
-    %thead
-      %tr
-        %th{ scope: "col" }
-          Nom
-
-    %tbody
-      - @admins_groups.each do |admins_group|
-        %tr
-          %td
-            = admins_group.name
diff --git a/app/views/admins_group_managers/_breadcrumbs.html.haml b/app/views/gestionnaires/_breadcrumbs.html.haml
similarity index 100%
rename from app/views/admins_group_managers/_breadcrumbs.html.haml
rename to app/views/gestionnaires/_breadcrumbs.html.haml
diff --git a/app/views/gestionnaires/groupe_gestionnaires/index.html.haml b/app/views/gestionnaires/groupe_gestionnaires/index.html.haml
new file mode 100644
index 000000000..aa56538b9
--- /dev/null
+++ b/app/views/gestionnaires/groupe_gestionnaires/index.html.haml
@@ -0,0 +1,17 @@
+= render partial: 'gestionnaires/breadcrumbs',
+  locals: { steps: [['Groupes d\'administrateurs', gestionnaire_groupe_gestionnaires_path]] }
+
+#groupe_gestionnaires-index.container
+  %h1.fr-h1 Liste des groupes d'administrateurs
+
+  %table.fr-table.width-100.mt-3
+    %thead
+      %tr
+        %th{ scope: "col" }
+          Nom
+
+    %tbody
+      - @groupe_gestionnaires.each do |groupe_gestionnaire|
+        %tr
+          %td
+            = groupe_gestionnaire.name
diff --git a/app/views/groupe_gestionnaire_mailer/notify_removed_gestionnaire.html.haml b/app/views/groupe_gestionnaire_mailer/notify_removed_gestionnaire.html.haml
new file mode 100644
index 000000000..94f82e361
--- /dev/null
+++ b/app/views/groupe_gestionnaire_mailer/notify_removed_gestionnaire.html.haml
@@ -0,0 +1,6 @@
+%p= t(:hello, scope: [:views, :shared, :greetings])
+
+%p
+  = t(".email_body", groupe_gestionnaire_name: @groupe_gestionnaire.name, email: @current_super_admin_email, application_name: APPLICATION_NAME)
+
+= render partial: "layouts/mailers/signature"
diff --git a/app/views/manager/gestionnaires/_collection_item_actions.html.erb b/app/views/manager/gestionnaires/_collection_item_actions.html.erb
new file mode 100644
index 000000000..eca420c77
--- /dev/null
+++ b/app/views/manager/gestionnaires/_collection_item_actions.html.erb
@@ -0,0 +1,17 @@
+<% if existing_action?(collection_presenter.resource_name, :edit) %>
+  <td><%= link_to(
+    t("administrate.actions.edit"),
+    [:edit, namespace, resource],
+    class: "action-edit",
+  ) if accessible_action?(resource, :edit) %></td>
+<% end %>
+
+<% if existing_action?(collection_presenter.resource_name, :destroy) %>
+  <td><%= link_to(
+    t("administrate.actions.destroy"),
+    [namespace, resource],
+    class: "text-color-red",
+    method: :delete,
+    data: { confirm: t("administrate.actions.confirm") }
+  ) if accessible_action?(resource, :destroy) %></td>
+<% end %>
\ No newline at end of file
diff --git a/app/views/manager/gestionnaires/_index_header.erb b/app/views/manager/gestionnaires/_index_header.erb
new file mode 100644
index 000000000..a14a3ba93
--- /dev/null
+++ b/app/views/manager/gestionnaires/_index_header.erb
@@ -0,0 +1,27 @@
+<% content_for(:title) do %>
+  <%= display_resource_name(page.resource_name) %>
+<% end %>
+
+<header class="main-content__header">
+  <h1 class="main-content__page-title" id="page-title">
+    <%= content_for(:title) %>
+  </h1>
+
+  <% if show_search_bar %>
+    <%= render(
+      "search",
+      search_term: search_term,
+      resource_name: display_resource_name(page.resource_name)
+    ) %>
+  <% end %>
+
+  <div>
+    <%= link_to(
+      t(
+        "manager.gestionnaires.manage_root_groupe_gestionnaire"
+      ),
+      manager_groupe_gestionnaires_path,
+      class: "button",
+    ) %>
+  </div>
+</header>
\ No newline at end of file
diff --git a/app/views/manager/groupe_gestionnaires/_collection_gestionnaires.html.erb b/app/views/manager/groupe_gestionnaires/_collection_gestionnaires.html.erb
new file mode 100644
index 000000000..60a646331
--- /dev/null
+++ b/app/views/manager/groupe_gestionnaires/_collection_gestionnaires.html.erb
@@ -0,0 +1,81 @@
+
+<% if attribute.resources.any? %>
+<% order = attribute.order_from_params(params.fetch(attribute.name, {})) %>
+<% page_number = params.fetch(attribute.name, {}).fetch(:page, nil) %>
+
+<table aria-labelledby="<%= attribute.name %>">
+  <thead>
+    <tr>
+      <% attribute.associated_collection(order).attribute_types.select{ |attr_name, attr_type| [:id, :user].include?(attr_name) }.each do |attr_name, attr_type| %>
+        <th class="cell-label
+        cell-label--<%= attr_type.html_class %>
+        cell-label--<%= attribute.associated_collection(order).ordered_html_class(attr_name) %>
+        cell-label--<%= "#{attribute.associated_collection(order).resource_name}_#{attr_name}" %>"
+        scope="col"
+        aria-sort="<%= sort_order(attribute.associated_collection(order).ordered_html_class(attr_name)) %>">
+        <%= link_to(sanitized_order_params(page, attribute.name).merge(
+          attribute.associated_collection(order).order_params_for(attr_name, key: attribute.name)
+        )) do %>
+        <%= t(
+          "helpers.label.#{attribute.associated_collection(order).resource_name}.#{attr_name}",
+          default: attribute.associated_class.human_attribute_name(attr_name).titleize,
+        ) %>
+            <% if attribute.associated_collection(order).ordered_by?(attr_name) %>
+              <span class="cell-label__sort-indicator cell-label__sort-indicator--<%= attribute.associated_collection(order).ordered_html_class(attr_name) %>">
+                <svg aria-hidden="true">
+                  <use xlink:href="#icon-up-caret" />
+                </svg>
+              </span>
+            <% end %>
+          <% end %>
+        </th>
+      <% end %>
+      <% [false && existing_action?(attribute.associated_collection(order).resource_name, :edit),
+          existing_action?(attribute.associated_collection(order).resource_name, :destroy)].count(true).times do %>
+        <th scope="col"></th>
+      <% end %>
+    </tr>
+  </thead>
+
+  <tbody>
+    <% attribute.resources(page_number, order).each do |resource| %>
+      <tr class="js-table-row">
+        <% attribute.associated_collection(order).attributes_for(resource).select{ |field| ["id", "user"].include?(field.name) }.each do |field| %>
+          <td class="cell-data cell-data--<%= field.html_class %>">
+              <%= render_field field %>
+          </td>
+        <% end %>
+        <% if false %>
+          <td><%= link_to(
+            t("administrate.actions.edit"),
+            [:edit, namespace, resource],
+            class: "action-edit",
+          ) if accessible_action?(resource, :edit) %></td>
+        <% end %>
+        
+        <% if existing_action?(attribute.associated_collection(order).resource_name, :destroy) %>
+          <td class="actions"><%= button_to 'Retirer',
+          { action: :remove_gestionnaire, id: page.resource.id },
+          { method: :delete,
+            data: { confirm: t("administrate.actions.confirm") },
+            params: { gestionnaire: { id: resource.id }},
+            class: 'fr-btn fr-btn--secondary' } 
+          %></td>
+        <% end %>
+      </tr>
+    <% end %>
+  </tbody>
+</table>
+
+<% if attribute.more_than_limit? %>
+  <%= render("pagination", resources: attribute.resources(page_number), param_name: "#{attribute.name}[page]") %>
+<% end %>
+
+<% else %>
+<%= t("administrate.fields.has_many.none", default: "–") %>
+<% end %>
+
+<%= form_tag(add_gestionnaire_manager_groupe_gestionnaire_path(page.resource), style: 'margin-top: 1rem;') do %>
+    <%= email_field_tag(:emails, '', placeholder: 'Emails', autocapitalize: 'off', autocorrect: 'off', spellcheck: 'false', style: 'margin-bottom: 1rem;width:24rem;') %>
+    <button>Ajouter un gestionnaire</button>
+<% end %>
diff --git a/app/views/manager/admins_groups/show.html.erb b/app/views/manager/groupe_gestionnaires/show.html.erb
similarity index 65%
rename from app/views/manager/admins_groups/show.html.erb
rename to app/views/manager/groupe_gestionnaires/show.html.erb
index e7e777c31..659206d7d 100644
--- a/app/views/manager/admins_groups/show.html.erb
+++ b/app/views/manager/groupe_gestionnaires/show.html.erb
@@ -15,8 +15,8 @@ as well as a link to its edit page.
 
 [1]: http://www.rubydoc.info/gems/administrate/Administrate/Page/Show
 %>
+
 <% content_for(:title) { t("administrate.actions.show_resource", name: page.page_title) } %>
-<% admins_group = page.resource %>
 
 <header class="main-content__header" role="banner">
   <h1 class="main-content__page-title">
@@ -28,9 +28,16 @@ as well as a link to its edit page.
       t("administrate.actions.edit_resource", name: page.page_title),
       [:edit, namespace, page.resource],
       class: "button",
-    ) if valid_action? :edit %>
-  </div>
+    ) if accessible_action?(page.resource, :edit) %>
 
+    <%= link_to(
+      t("administrate.actions.destroy"),
+      [namespace, page.resource],
+      class: "button button--danger",
+      method: :delete,
+      data: { confirm: t("administrate.actions.confirm") }
+    ) if accessible_action?(page.resource, :destroy) %>
+  </div>
 </header>
 
 <section class="main-content__body">
@@ -39,18 +46,21 @@ as well as a link to its edit page.
       <dt class="attribute-label" id="<%= attribute.name %>">
       <%= t(
         "helpers.label.#{resource_name}.#{attribute.name}",
-        default: attribute.name.titleize,
+        default: page.resource.class.human_attribute_name(attribute.name),
       ) %>
       </dt>
 
       <dd class="attribute-data attribute-data--<%=attribute.html_class%>">
-        <%= render_field attribute, page: page %>
-        <% if attribute.name == 'admins_group_managers' %>
-          <%= form_tag(add_admins_group_manager_manager_admins_group_path(admins_group), style: 'margin-top: 1rem;') do %>
-            <%= email_field_tag(:emails, '', placeholder: 'Emails', autocapitalize: 'off', autocorrect: 'off', spellcheck: 'false', style: 'margin-bottom: 1rem;width:24rem;') %>
-            <button>Ajouter un gestionnaire</button>
+          <% if attribute.name == 'gestionnaires' %>
+
+          <%= render(
+            "collection_gestionnaires",
+            page: page,
+            attribute: attribute
+          ) %>
+          <% else %>
+          <%= render_field attribute, page: page %>
           <% end %>
-        <% end %>
       </dd>
     <% end %>
   </dl>
diff --git a/app/views/user_mailer/invite_admins_group_manager.html.haml b/app/views/user_mailer/invite_admins_group_manager.html.haml
deleted file mode 100644
index 879f9898f..000000000
--- a/app/views/user_mailer/invite_admins_group_manager.html.haml
+++ /dev/null
@@ -1,13 +0,0 @@
-- content_for(:title, 'Activation de votre compte gestionnaire')
-
-%p
-  Bonjour,
-
-%p
-  Vous venez d’être nommé gestionnaire du groupe #{@admins_group.name} sur #{APPLICATION_NAME}.
-
-%p
-  Votre compte a été créé pour l'adresse email #{@user.email}. Pour l’activer, nous vous invitons à cliquer sur le lien suivant : 
-  = link_to(users_activate_url(token: @reset_password_token), users_activate_url(token: @reset_password_token))
-
-= render partial: "layouts/mailers/signature"
diff --git a/config/env.example b/config/env.example
index 05277a328..a3624b572 100644
--- a/config/env.example
+++ b/config/env.example
@@ -155,6 +155,3 @@ CLAMAV_ENABLED="disabled"
 
 # Siret number used for API Entreprise, by default we use SIRET from dinum
 API_ENTREPRISE_DEFAULT_SIRET="put_your_own_siret"
-
-# Admins group usage (gestionnaire de groupes d'administrateurs)
-ADMINS_GROUP_ENABLED="disabled"
\ No newline at end of file
diff --git a/config/locales/models/admins_group_manager/fr.yml b/config/locales/models/admins_group_manager/fr.yml
deleted file mode 100644
index c6d9b2293..000000000
--- a/config/locales/models/admins_group_manager/fr.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-fr:
-  activerecord:
-    attributes:
-      admins_group_manager:
-        admins_groups: Groupes
-    models:
-      admins_group_manager:
-        one: Gestionnaire
-        other: Gestionnaires
diff --git a/config/locales/models/admins_group/fr.yml b/config/locales/models/groupe_gestionnaire/fr.yml
similarity index 58%
rename from config/locales/models/admins_group/fr.yml
rename to config/locales/models/groupe_gestionnaire/fr.yml
index 4aeb8b4ba..ef29657cb 100644
--- a/config/locales/models/admins_group/fr.yml
+++ b/config/locales/models/groupe_gestionnaire/fr.yml
@@ -1,9 +1,9 @@
 fr:
   activerecord:
     attributes:
-      admins_group:
-        admins_group_managers: Gestionnaires
+      groupe_gestionnaire:
+        gestionnaires: Gestionnaires
     models:
-      admins_group:
+      groupe_gestionnaire:
         one: Groupe d'administrateurs
         other: Groupes d'administrateurs
diff --git a/config/locales/views/admins_group_mailer/notify_added_admins_group_managers/en.yml b/config/locales/views/admins_group_mailer/notify_added_admins_group_managers/en.yml
deleted file mode 100644
index 95528051d..000000000
--- a/config/locales/views/admins_group_mailer/notify_added_admins_group_managers/en.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-en:
-  admins_group_mailer:
-    notify_added_admins_group_managers:
-      email_body: "You were assigned as manager on the admins group %{admins_group_name} on %{application_name} by « %{email} »"
diff --git a/config/locales/views/admins_group_mailer/notify_added_admins_group_managers/fr.yml b/config/locales/views/admins_group_mailer/notify_added_admins_group_managers/fr.yml
deleted file mode 100644
index f63b8007c..000000000
--- a/config/locales/views/admins_group_mailer/notify_added_admins_group_managers/fr.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-fr:
-  admins_group_mailer:
-    notify_added_admins_group_managers:
-      email_body: "Vous venez d’être nommé gestionnaire du groupe %{admins_group_name} sur %{application_name} par « %{email} »."
diff --git a/config/locales/views/groupe_gestionnaire_mailer/notify_removed_gestionnaire/en.yml b/config/locales/views/groupe_gestionnaire_mailer/notify_removed_gestionnaire/en.yml
new file mode 100644
index 000000000..836737fa6
--- /dev/null
+++ b/config/locales/views/groupe_gestionnaire_mailer/notify_removed_gestionnaire/en.yml
@@ -0,0 +1,4 @@
+en:
+  groupe_gestionnaire_mailer:
+    notify_removed_gestionnaire:
+      email_body: "You were removed from the admins group %{groupe_gestionnaire_name} on %{application_name} by « %{email} »"
diff --git a/config/locales/views/groupe_gestionnaire_mailer/notify_removed_gestionnaire/fr.yml b/config/locales/views/groupe_gestionnaire_mailer/notify_removed_gestionnaire/fr.yml
new file mode 100644
index 000000000..927149552
--- /dev/null
+++ b/config/locales/views/groupe_gestionnaire_mailer/notify_removed_gestionnaire/fr.yml
@@ -0,0 +1,4 @@
+fr:
+  groupe_gestionnaire_mailer:
+    notify_removed_gestionnaire:
+      email_body: "Vous venez d’être supprimé(e) du groupe %{groupe_gestionnaire_name} sur %{application_name} par « %{email} »."
diff --git a/config/locales/views/manager/en.yml b/config/locales/views/manager/en.yml
new file mode 100644
index 000000000..4ff35c232
--- /dev/null
+++ b/config/locales/views/manager/en.yml
@@ -0,0 +1,9 @@
+en:
+  manager:
+    groupe_gestionnaires:
+      add_gestionnaire:
+        wrong_address:
+          one: "%{emails} is not a valid email address"
+          other: "%{emails} are not valid email addresses"
+    gestionnaires:
+      manage_root_groupe_gestionnaire: Root group management
diff --git a/config/locales/views/manager/fr.yml b/config/locales/views/manager/fr.yml
index 108d954bd..aea601ee2 100644
--- a/config/locales/views/manager/fr.yml
+++ b/config/locales/views/manager/fr.yml
@@ -5,3 +5,5 @@ fr:
         wrong_address:
           one: "%{emails} n’est pas une adresse email valide"
           other: "%{emails} ne sont pas des adresses emails valides"
+    gestionnaires:
+      manage_root_groupe_gestionnaire: Gestion du groupe racine
diff --git a/config/routes.rb b/config/routes.rb
index 8404179c1..31ec57ac7 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -57,10 +57,11 @@ Rails.application.routes.draw do
     end
 
     if ENV['ADMINS_GROUP_ENABLED'] == 'enabled' # can be removed if needed when EVERY PARTS of the feature will be merged / from env.example.optional
-      resources :gestionnaires, only: [:index, :show, :edit, :update]
+      resources :gestionnaires, only: [:index, :show, :edit, :update, :destroy]
 
       resources :groupe_gestionnaires, path: 'groupe_administrateurs', only: [:index, :show, :new, :create, :edit, :update] do
         post 'add_gestionnaire', on: :member
+        delete 'remove_gestionnaire', on: :member
       end
     end
 
diff --git a/db/migrate/20230813091837_create_admins_group_managers.rb b/db/migrate/20230813091837_create_admins_group_managers.rb
deleted file mode 100644
index b8cb3780c..000000000
--- a/db/migrate/20230813091837_create_admins_group_managers.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class CreateAdminsGroupManagers < ActiveRecord::Migration[7.0]
-  def change
-    create_table "admins_group_managers" do |t|
-      t.bigint :user_id, null: false
-      t.index [:user_id], name: :index_admins_group_managers_on_user_id
-      t.timestamps
-    end
-  end
-end
diff --git a/db/migrate/20230813091838_create_admins_groups.rb b/db/migrate/20230813091838_create_admins_groups.rb
deleted file mode 100644
index 75a38013e..000000000
--- a/db/migrate/20230813091838_create_admins_groups.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-class CreateAdminsGroups < ActiveRecord::Migration[7.0]
-  def change
-    create_table "admins_groups" do |t|
-      t.string :name, null: false
-      t.references :admins_group
-      t.index [:name], name: :index_admins_groups_on_name
-      t.timestamps
-    end
-
-    create_join_table :admins_groups, :admins_group_managers do |t|
-      t.index [:admins_group_id, :admins_group_manager_id], name: :index_on_admins_group_and_admins_group_manager
-      t.index [:admins_group_manager_id, :admins_group_id], name: :index_on_admins_group_manager_and_admins_group
-    end
-  end
-end
diff --git a/db/migrate/20230813091846_add_admins_group_to_administrateurs.rb b/db/migrate/20230813091846_add_admins_group_to_administrateurs.rb
deleted file mode 100644
index 52c07d340..000000000
--- a/db/migrate/20230813091846_add_admins_group_to_administrateurs.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-class AddAdminsGroupToAdministrateurs < ActiveRecord::Migration[7.0]
-  disable_ddl_transaction!
-
-  def change
-    add_reference :administrateurs, :admins_group, index: { algorithm: :concurrently }, null: true
-  end
-end
diff --git a/db/migrate/20230813091847_add_foreign_key_admins_group_to_administrateurs.rb b/db/migrate/20230813091847_add_foreign_key_admins_group_to_administrateurs.rb
deleted file mode 100644
index e155c3a13..000000000
--- a/db/migrate/20230813091847_add_foreign_key_admins_group_to_administrateurs.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddForeignKeyAdminsGroupToAdministrateurs < ActiveRecord::Migration[7.0]
-  def change
-    add_foreign_key :administrateurs, :admins_groups, validate: false
-  end
-end
diff --git a/db/migrate/20230813091848_validate_foreign_key_admins_group_to_administrateurs.rb b/db/migrate/20230813091848_validate_foreign_key_admins_group_to_administrateurs.rb
deleted file mode 100644
index 6af848b01..000000000
--- a/db/migrate/20230813091848_validate_foreign_key_admins_group_to_administrateurs.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class ValidateForeignKeyAdminsGroupToAdministrateurs < ActiveRecord::Migration[7.0]
-  def change
-    validate_foreign_key :administrateurs, :admins_groups
-  end
-end
diff --git a/db/schema.rb b/db/schema.rb
index f5e445eeb..e9ba894e6 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -61,7 +61,6 @@ ActiveRecord::Schema[7.0].define(version: 2023_10_10_083144) do
   end
 
   create_table "administrateurs", id: :serial, force: :cascade do |t|
-    t.bigint "admins_group_id"
     t.datetime "created_at", precision: 6
     t.bigint "groupe_gestionnaire_id"
     t.datetime "updated_at", precision: 6
@@ -91,29 +90,6 @@ ActiveRecord::Schema[7.0].define(version: 2023_10_10_083144) do
     t.index ["procedure_id"], name: "index_administrateurs_procedures_on_procedure_id"
   end
 
-  create_table "admins_group_managers", force: :cascade do |t|
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.bigint "user_id", null: false
-    t.index ["user_id"], name: "index_admins_group_managers_on_user_id"
-  end
-
-  create_table "admins_group_managers_groups", id: false, force: :cascade do |t|
-    t.bigint "admins_group_id", null: false
-    t.bigint "admins_group_manager_id", null: false
-    t.index ["admins_group_id", "admins_group_manager_id"], name: "index_on_admins_group_and_admins_group_manager"
-    t.index ["admins_group_manager_id", "admins_group_id"], name: "index_on_admins_group_manager_and_admins_group"
-  end
-
-  create_table "admins_groups", force: :cascade do |t|
-    t.bigint "admins_group_id"
-    t.datetime "created_at", null: false
-    t.string "name", null: false
-    t.datetime "updated_at", null: false
-    t.index ["admins_group_id"], name: "index_admins_groups_on_admins_group_id"
-    t.index ["name"], name: "index_admins_groups_on_name"
-  end
-
   create_table "api_tokens", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
     t.bigint "administrateur_id", null: false
     t.bigint "allowed_procedure_ids", array: true
diff --git a/spec/controllers/admins_group_managers/admins_group_manager_controller_spec.rb b/spec/controllers/admins_group_managers/admins_group_manager_controller_spec.rb
deleted file mode 100644
index 721188fc1..000000000
--- a/spec/controllers/admins_group_managers/admins_group_manager_controller_spec.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-describe AdminsGroupManagers::AdminsGroupManagerController, type: :controller do
-  describe 'before actions: authenticate_admins_group_manager!' do
-    it 'is present' do
-      before_actions = AdminsGroupManagers::AdminsGroupManagerController
-        ._process_action_callbacks
-        .filter { |process_action_callbacks| process_action_callbacks.kind == :before }
-        .map(&:filter)
-
-      expect(before_actions).to include(:authenticate_admins_group_manager!)
-    end
-  end
-end
diff --git a/spec/controllers/admins_group_managers/admins_groups_controller_spec.rb b/spec/controllers/admins_group_managers/admins_groups_controller_spec.rb
deleted file mode 100644
index 0feaecf17..000000000
--- a/spec/controllers/admins_group_managers/admins_groups_controller_spec.rb
+++ /dev/null
@@ -1,23 +0,0 @@
-describe AdminsGroupManagers::AdminsGroupsController, type: :controller do
-  let(:admins_group_manager) { create(:admins_group_manager) }
-
-  describe "#index" do
-    subject { get :index }
-
-    context "when not logged" do
-      before { subject }
-      it { expect(response).to redirect_to(new_user_session_path) }
-    end
-
-    context "when logged in" do
-      let!(:admins_group) { create(:admins_group, admins_group_managers: [admins_group_manager]) }
-      before do
-        sign_in(admins_group_manager.user)
-        subject
-      end
-
-      it { expect(response).to have_http_status(:ok) }
-      it { expect(assigns(:admins_groups)).to include(admins_group) }
-    end
-  end
-end
diff --git a/spec/controllers/gestionnaires/gestionnaire_controller_spec.rb b/spec/controllers/gestionnaires/gestionnaire_controller_spec.rb
new file mode 100644
index 000000000..d00115cc8
--- /dev/null
+++ b/spec/controllers/gestionnaires/gestionnaire_controller_spec.rb
@@ -0,0 +1,12 @@
+describe Gestionnaires::GestionnaireController, type: :controller do
+  describe 'before actions: authenticate_gestionnaire!' do
+    it 'is present' do
+      before_actions = Gestionnaires::GestionnaireController
+        ._process_action_callbacks
+        .filter { |process_action_callbacks| process_action_callbacks.kind == :before }
+        .map(&:filter)
+
+      expect(before_actions).to include(:authenticate_gestionnaire!)
+    end
+  end
+end
diff --git a/spec/controllers/gestionnaires/groupe_gestionnaires_controller_spec.rb b/spec/controllers/gestionnaires/groupe_gestionnaires_controller_spec.rb
new file mode 100644
index 000000000..d47f467b0
--- /dev/null
+++ b/spec/controllers/gestionnaires/groupe_gestionnaires_controller_spec.rb
@@ -0,0 +1,23 @@
+describe Gestionnaires::GroupeGestionnairesController, type: :controller do
+  let(:gestionnaire) { create(:gestionnaire) }
+
+  describe "#index" do
+    subject { get :index }
+
+    context "when not logged" do
+      before { subject }
+      it { expect(response).to redirect_to(new_user_session_path) }
+    end
+
+    context "when logged in" do
+      let!(:groupe_gestionnaire) { create(:groupe_gestionnaire, gestionnaires: [gestionnaire]) }
+      before do
+        sign_in(gestionnaire.user)
+        subject
+      end
+
+      it { expect(response).to have_http_status(:ok) }
+      it { expect(assigns(:groupe_gestionnaires)).to include(groupe_gestionnaire) }
+    end
+  end
+end
diff --git a/spec/controllers/manager/admins_group_managers_controller_spec.rb b/spec/controllers/manager/admins_group_managers_controller_spec.rb
deleted file mode 100644
index a732bdee7..000000000
--- a/spec/controllers/manager/admins_group_managers_controller_spec.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-describe Manager::AdminsGroupManagersController, type: :controller do
-  let(:super_admin) { create(:super_admin) }
-  let(:admins_group_manager) { create(:admins_group_manager) }
-
-  before { sign_in super_admin }
-
-  describe '#index' do
-    render_views
-
-    it 'searches admin by email' do
-      get :index, params: { search: admins_group_manager.email }
-      expect(response).to have_http_status(:success)
-    end
-  end
-
-  describe '#show' do
-    render_views
-
-    before do
-      get :show, params: { id: admins_group_manager.id }
-    end
-
-    it { expect(response.body).to include(admins_group_manager.email) }
-  end
-end
diff --git a/spec/controllers/manager/admins_groups_controller_spec.rb b/spec/controllers/manager/admins_groups_controller_spec.rb
deleted file mode 100644
index d556ec317..000000000
--- a/spec/controllers/manager/admins_groups_controller_spec.rb
+++ /dev/null
@@ -1,27 +0,0 @@
-describe Manager::AdminsGroupsController, type: :controller do
-  let(:super_admin) { create(:super_admin) }
-  let(:admins_group) { create(:admins_group) }
-
-  before { sign_in super_admin }
-
-  describe '#index' do
-    render_views
-
-    before do
-      admins_group
-      get :index
-    end
-
-    it { expect(response.body).to include(admins_group.name) }
-  end
-
-  describe '#show' do
-    render_views
-
-    before do
-      get :show, params: { id: admins_group.id }
-    end
-
-    it { expect(response.body).to include(admins_group.name) }
-  end
-end
diff --git a/spec/controllers/manager/gestionnaires_controller_spec.rb b/spec/controllers/manager/gestionnaires_controller_spec.rb
new file mode 100644
index 000000000..5357b6def
--- /dev/null
+++ b/spec/controllers/manager/gestionnaires_controller_spec.rb
@@ -0,0 +1,25 @@
+describe Manager::GestionnairesController, type: :controller do
+  let(:super_admin) { create(:super_admin) }
+  let(:gestionnaire) { create(:gestionnaire) }
+
+  before { sign_in super_admin }
+
+  describe '#index' do
+    render_views
+
+    it 'searches admin by email' do
+      get :index, params: { search: gestionnaire.email }
+      expect(response).to have_http_status(:success)
+    end
+  end
+
+  describe '#show' do
+    render_views
+
+    before do
+      get :show, params: { id: gestionnaire.id }
+    end
+
+    it { expect(response.body).to include(gestionnaire.email) }
+  end
+end
diff --git a/spec/controllers/manager/groupe_gestionnaires_controller_spec.rb b/spec/controllers/manager/groupe_gestionnaires_controller_spec.rb
new file mode 100644
index 000000000..ae52bd02c
--- /dev/null
+++ b/spec/controllers/manager/groupe_gestionnaires_controller_spec.rb
@@ -0,0 +1,82 @@
+describe Manager::GroupeGestionnairesController, type: :controller do
+  let(:super_admin) { create(:super_admin) }
+  let(:groupe_gestionnaire) { create(:groupe_gestionnaire) }
+
+  before { sign_in super_admin }
+
+  describe '#index' do
+    render_views
+
+    before do
+      groupe_gestionnaire
+      get :index
+    end
+
+    it { expect(response.body).to include(groupe_gestionnaire.name) }
+  end
+
+  describe '#show' do
+    render_views
+
+    before do
+      get :show, params: { id: groupe_gestionnaire.id }
+    end
+
+    it { expect(response.body).to include(groupe_gestionnaire.name) }
+  end
+
+  describe '#add_gestionnaire' do
+    before do
+      post :add_gestionnaire,
+        params: {
+          id: groupe_gestionnaire.id,
+          emails: new_gestionnaire_email
+        }
+    end
+
+    context 'of a new gestionnaire' do
+      let(:new_gestionnaire_email) { 'new_gestionnaire@mail.com' }
+
+      it { expect(groupe_gestionnaire.gestionnaires.map(&:email)).to include(new_gestionnaire_email) }
+      it { expect(flash.notice).to be_present }
+      it { expect(response).to redirect_to(manager_groupe_gestionnaire_path(groupe_gestionnaire)) }
+    end
+  end
+
+  describe '#remove_gestionnaire' do
+    let(:gestionnaire) { create(:gestionnaire) }
+    let(:new_gestionnaire) { create(:gestionnaire) }
+
+    before do
+      groupe_gestionnaire.gestionnaires << gestionnaire << new_gestionnaire
+    end
+
+    def remove_gestionnaire(gestionnaire)
+      delete :remove_gestionnaire,
+        params: {
+          id: groupe_gestionnaire.id,
+          gestionnaire: { id: gestionnaire.id }
+        }
+    end
+
+    context 'when there are many gestionnaires' do
+      before { remove_gestionnaire(new_gestionnaire) }
+
+      it { expect(groupe_gestionnaire.gestionnaires).to include(gestionnaire) }
+      it { expect(groupe_gestionnaire.reload.gestionnaires.count).to eq(1) }
+      it { expect(response).to redirect_to(manager_groupe_gestionnaire_path(groupe_gestionnaire)) }
+    end
+
+    context 'when there is only one gestionnaire' do
+      before do
+        remove_gestionnaire(new_gestionnaire)
+        remove_gestionnaire(gestionnaire)
+      end
+
+      it { expect(groupe_gestionnaire.gestionnaires).to include(gestionnaire) }
+      it { expect(groupe_gestionnaire.gestionnaires.count).to eq(1) }
+      it { expect(flash.alert).to eq('Suppression impossible : il doit y avoir au moins un gestionnaire dans le groupe racine') }
+      it { expect(response).to redirect_to(manager_groupe_gestionnaire_path(groupe_gestionnaire)) }
+    end
+  end
+end
diff --git a/spec/factories/admins_group.rb b/spec/factories/admins_group.rb
deleted file mode 100644
index b85b14cd4..000000000
--- a/spec/factories/admins_group.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-FactoryBot.define do
-  factory :admins_group do
-    sequence(:name) { |n| "Group #{n}" }
-  end
-end
diff --git a/spec/factories/admins_group_manager.rb b/spec/factories/admins_group_manager.rb
deleted file mode 100644
index b8bf34a83..000000000
--- a/spec/factories/admins_group_manager.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-FactoryBot.define do
-  sequence(:admins_group_manager_email) { |n| "admins_group_manager#{n}@demarches-simplifiees.fr" }
-
-  factory :admins_group_manager do
-    user { association :user, email: email, password: password }
-
-    transient do
-      email { generate(:admins_group_manager_email) }
-      password { 'somethingverycomplated!' }
-    end
-  end
-end
diff --git a/spec/mailers/admins_group_mailer_spec.rb b/spec/mailers/admins_group_mailer_spec.rb
deleted file mode 100644
index dfb507417..000000000
--- a/spec/mailers/admins_group_mailer_spec.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-RSpec.describe AdminsGroupMailer, type: :mailer do
-  describe '#notify_added_admins_group_managers' do
-    let(:admins_group) { create(:admins_group) }
-
-    let(:admins_group_managers_to_add) { [create(:admins_group_manager, email: 'int3@g'), create(:admins_group_manager, email: 'int4@g')] }
-
-    let(:current_super_admin_email) { 'toto@email.com' }
-
-    subject { described_class.notify_added_admins_group_managers(admins_group, admins_group_managers_to_add, current_super_admin_email) }
-
-    before { admins_group_managers_to_add.each { admins_group.add(_1) } }
-
-    it { expect(subject.body).to include('Vous venez d’être nommé gestionnaire du groupe') }
-    it { expect(subject.bcc).to match_array(['int3@g', 'int4@g']) }
-  end
-end
diff --git a/spec/mailers/groupe_gestionnaire_mailer_spec.rb b/spec/mailers/groupe_gestionnaire_mailer_spec.rb
index 0efbf4c4f..1ce585f54 100644
--- a/spec/mailers/groupe_gestionnaire_mailer_spec.rb
+++ b/spec/mailers/groupe_gestionnaire_mailer_spec.rb
@@ -1,4 +1,17 @@
 RSpec.describe GroupeGestionnaireMailer, type: :mailer do
+  describe '#notify_removed_gestionnaire' do
+    let(:groupe_gestionnaire) { create(:groupe_gestionnaire) }
+
+    let(:gestionnaire_to_remove) { create(:gestionnaire, email: 'int3@g') }
+
+    let(:current_super_admin_email) { 'toto@email.com' }
+
+    subject { described_class.notify_removed_gestionnaire(groupe_gestionnaire, gestionnaire_to_remove, current_super_admin_email) }
+
+    it { expect(subject.body).to include('Vous venez d’être supprimé(e) du groupe') }
+    it { expect(subject.to).to match_array(['int3@g']) }
+  end
+
   describe '#notify_added_gestionnaires' do
     let(:groupe_gestionnaire) { create(:groupe_gestionnaire) }
 
diff --git a/spec/mailers/previews/admins_group_mailer_preview.rb b/spec/mailers/previews/admins_group_mailer_preview.rb
deleted file mode 100644
index 0c92760ef..000000000
--- a/spec/mailers/previews/admins_group_mailer_preview.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-class AdminsGroupMailerPreview < ActionMailer::Preview
-  def notify_added_admins_group_managers
-    admins_group = AdminsGroup.new(name: 'un groupe d\'admin')
-    current_super_admin_email = 'admin@dgfip.com'
-    admins_group_managers = [AdminsGroupManager.new(user: user)]
-    AdminsGroupMailer.notify_added_admins_group_managers(admins_group, admins_group_managers, current_super_admin_email)
-  end
-
-  private
-
-  def user
-    User.new(id: 10, email: 'test@exemple.fr')
-  end
-end
diff --git a/spec/mailers/previews/groupe_gestionnaire_mailer_preview.rb b/spec/mailers/previews/groupe_gestionnaire_mailer_preview.rb
index e522ee69d..53ce5f929 100644
--- a/spec/mailers/previews/groupe_gestionnaire_mailer_preview.rb
+++ b/spec/mailers/previews/groupe_gestionnaire_mailer_preview.rb
@@ -1,4 +1,11 @@
 class GroupeGestionnaireMailerPreview < ActionMailer::Preview
+  def notify_removed_gestionnaire
+    groupe_gestionnaire = GroupeGestionnaire.new(name: 'un groupe d\'admin')
+    current_super_admin_email = 'admin@dgfip.com'
+    gestionnaire = Gestionnaire.new(user: user)
+    GroupeGestionnaireMailer.notify_removed_gestionnaire(groupe_gestionnaire, gestionnaire, current_super_admin_email)
+  end
+
   def notify_added_gestionnaires
     groupe_gestionnaire = GroupeGestionnaire.new(name: 'un groupe d\'admin')
     current_super_admin_email = 'admin@dgfip.com'
diff --git a/spec/models/admins_group_manager_spec.rb b/spec/models/admins_group_manager_spec.rb
deleted file mode 100644
index 61ca156d0..000000000
--- a/spec/models/admins_group_manager_spec.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-describe AdminsGroupManager, type: :model do
-  describe 'associations' do
-    it { is_expected.to have_and_belong_to_many(:admins_groups) }
-  end
-end
diff --git a/spec/models/admins_group_spec.rb b/spec/models/admins_group_spec.rb
deleted file mode 100644
index 30d227a4a..000000000
--- a/spec/models/admins_group_spec.rb
+++ /dev/null
@@ -1,8 +0,0 @@
-describe AdminsGroup, type: :model do
-  describe 'associations' do
-    it { is_expected.to belong_to(:admins_group).optional }
-    it { is_expected.to have_many(:children) }
-    it { is_expected.to have_many(:administrateurs) }
-    it { is_expected.to have_and_belong_to_many(:admins_group_managers) }
-  end
-end
diff --git a/spring-0/6ee76a9c97d4224cf119ff2469a53122.pid b/spring-0/6ee76a9c97d4224cf119ff2469a53122.pid
new file mode 100644
index 000000000..45a4fb75d
--- /dev/null
+++ b/spring-0/6ee76a9c97d4224cf119ff2469a53122.pid
@@ -0,0 +1 @@
+8