diff --git a/addons_extensions/project_task_timesheet_extended/models/teams.py b/addons_extensions/project_task_timesheet_extended/models/teams.py
index 8c7facac6..34b26563e 100644
--- a/addons_extensions/project_task_timesheet_extended/models/teams.py
+++ b/addons_extensions/project_task_timesheet_extended/models/teams.py
@@ -11,6 +11,24 @@ class InternalTeams(models.Model):
     active = fields.Boolean(default=True, help="Set active to false to hide the Teams without removing it.")
 
 
+    parent_id = fields.Many2one('internal.teams', string="Parent Team",
+                                domain="[('id', '!=', id)]")
+    child_ids = fields.One2many('internal.teams', 'parent_id', string="Child Teams")
+    active = fields.Boolean(default=True)
+
+    # Computed field to include members + child team members and leads
+    all_members_ids = fields.Many2many(
+        'res.users', compute='_compute_all_members', string="All Members", store=False
+    )
+
+    @api.depends('members_ids', 'child_ids.members_ids', 'child_ids.team_lead')
+    def _compute_all_members(self):
+        for rec in self:
+            all_members = rec.members_ids
+            for child in rec.child_ids:
+                all_members |= child.members_ids | child.team_lead
+            rec.all_members_ids = all_members
+
 
     def _compute_display_name(self):
         """ Custom display_name in case a registration is nott linked to an attendee
diff --git a/addons_extensions/project_task_timesheet_extended/security/security.xml b/addons_extensions/project_task_timesheet_extended/security/security.xml
index ec6ac9ab6..b469d8299 100644
--- a/addons_extensions/project_task_timesheet_extended/security/security.xml
+++ b/addons_extensions/project_task_timesheet_extended/security/security.xml
@@ -66,5 +66,8 @@
         </record>
 
     </data>
+    <data>
+
+    </data>
 
 </odoo>
\ No newline at end of file
diff --git a/addons_extensions/project_task_timesheet_extended/view/teams.xml b/addons_extensions/project_task_timesheet_extended/view/teams.xml
index 470c850e9..bd8c08d2c 100644
--- a/addons_extensions/project_task_timesheet_extended/view/teams.xml
+++ b/addons_extensions/project_task_timesheet_extended/view/teams.xml
@@ -11,6 +11,7 @@
             </list>
         </field>
     </record>
+
     <record id="internal_teams_form_view" model="ir.ui.view">
         <field name="name">internal.teams.form.view</field>
         <field name="model">internal.teams</field>
@@ -20,37 +21,56 @@
                     <group>
                         <field name="team_name"/>
                         <field name="team_lead"/>
-                        <notebook>
-                            <page name="team_members" string="Team">
-                                <field name="members_ids" widget="many2many">
-                                    <kanban quick_create="false" create="false" delete="true">
-                                        <field name="id"/>
-                                        <field name="name"/>
-                                        <templates>
-                                            <t t-name="kanban-box">
-                                                <div class="oe_kanban_global_click" style="max-width: 200px">
-                                                    <div class="o_kanban_record_top">
-                                                        <img t-att-src="kanban_image('res.users', 'image_1920', record.id.raw_value)"
-                                                             height="40" width="40"
-                                                             class="oe_avatar oe_kanban_avatar_smallbox mb0"
-                                                             alt="Avatar"/>
-                                                        <div class="o_kanban_record_headings ml8">
-                                                            <strong class="o_kanban_record_title">
-                                                                <field name="name"/>
-                                                            </strong>
-                                                        </div>
-                                                        <a t-if="! read_only_mode" type="delete" class="text-danger">
-                                                            <i class="fa fa-times" title="Delete"></i>
-                                                        </a>
-                                                    </div>
-                                                </div>
-                                            </t>
-                                        </templates>
-                                    </kanban>
-                                </field>
-                            </page>
-                        </notebook>
+                        <!-- ✅ added -->
+                        <field name="parent_id"/>
                     </group>
+
+                    <notebook>
+                        <page name="team_members" string="Team">
+                            <field name="members_ids" widget="many2many">
+                                <kanban quick_create="false" create="false" delete="true">
+                                    <field name="id"/>
+                                    <field name="name"/>
+                                    <templates>
+                                        <t t-name="kanban-box">
+                                            <div class="oe_kanban_global_click" style="max-width: 200px">
+                                                <div class="o_kanban_record_top">
+                                                    <img t-att-src="kanban_image('res.users', 'image_1920', record.id.raw_value)"
+                                                         height="40" width="40"
+                                                         class="oe_avatar oe_kanban_avatar_smallbox mb0"
+                                                         alt="Avatar"/>
+                                                    <div class="o_kanban_record_headings ml8">
+                                                        <strong class="o_kanban_record_title">
+                                                            <field name="name"/>
+                                                        </strong>
+                                                    </div>
+                                                    <a t-if="! read_only_mode" type="delete" class="text-danger">
+                                                        <i class="fa fa-times" title="Delete"></i>
+                                                    </a>
+                                                </div>
+                                            </div>
+                                        </t>
+                                    </templates>
+                                </kanban>
+                            </field>
+
+                            <!-- ✅ added: show combined team members including child team leads and members -->
+                            <field name="all_members_ids" widget="many2many_tags" readonly="1"
+                                   string="Including Child Teams"/>
+                        </page>
+
+                        <!-- ✅ added: Child Teams tab -->
+                        <page name="child_teams" string="Child Teams">
+                            <field name="child_ids">
+                                <list editable="bottom">
+                                    <field name="team_name"/>
+                                    <field name="team_lead"/>
+                                    <field name="members_ids" widget="many2many_tags"/>
+                                </list>
+                            </field>
+                        </page>
+
+                    </notebook>
                 </sheet>
             </form>
         </field>
@@ -63,8 +83,7 @@
         <field name="view_mode">list,form</field>
     </record>
 
-
-    <menuitem id="internal_teams_menu" name="Internal Teams" action="internal_teams_action_tree"
+    <menuitem id="internal_teams_menu" name="Internal Teams"
+              action="internal_teams_action_tree"
               parent="project.menu_project_config"/>
-
-</odoo>
\ No newline at end of file
+</odoo>