diff --git a/app/api/entities/organization_entity.rb b/app/api/entities/organization_entity.rb
new file mode 100644
index 000000000..bcfb1fd4b
--- /dev/null
+++ b/app/api/entities/organization_entity.rb
@@ -0,0 +1,13 @@
+module Entities
+    class OrganizationEntity < Grape::Entity
+      expose :id
+      expose :name
+      expose :description
+      expose :email
+      expose :is_enabled
+      expose :created_at
+      expose :updated_at
+
+      expose :users, using: Entities::UserEntity, if: { includes: :users }
+    end
+  end
\ No newline at end of file
diff --git a/app/api/organizations_api.rb b/app/api/organizations_api.rb
new file mode 100644
index 000000000..3f73a9911
--- /dev/null
+++ b/app/api/organizations_api.rb
@@ -0,0 +1,205 @@
+class OrganizationsApi < Grape::API
+  helpers AuthenticationHelpers
+  helpers AuthorisationHelpers
+
+  before do 
+    authenticated?
+  end
+
+  # View Enrolled Organizations of a User
+  desc 'Find all Organizations of a User'
+   get '/organizations/enrolled' do 
+   user_orgs = current_user.organizations
+
+   present user_orgs, with: Entities::OrganizationEntity
+  end
+end
+
+
+   #View Organization by ID
+  desc 'Get organization by ID'
+  get '/organizations/:id' do 
+    organization = Organization.find(params[:id])
+    unless authorise? current_user, organization, :view_members
+      error!({error: 'Not Authorized to view the organization'}, 403)
+    end
+    present organization, with: Entities::OrganizationEntity, includes: [:users]
+  end
+
+  #View Members of an Organization
+  desc'Get Organization members'
+  get '/organizations/:id/members' do
+    organization = Organization.find(params[:id])
+    unless authorise? current_user, organization, :view_members
+        error!({error: 'Not Authorized to view the organization members '}, 403)
+    end
+    present organization.users, with: Entities::User
+  end
+   
+  #View asll Organizations (Admin)
+  desc 'Get all organizations (admin only)'
+  get '/organizations' do
+    unless authorise? current_user, Organization, :manage_organization
+      error!({ error: 'Not authorized to view all organizations' }, 403)
+    end
+    
+    organizations = Organization.all
+    present organizations, with: Entities::OrganizationEntity
+  end
+
+  #Create New Organization
+  desc 'Create a new organization'
+  params do 
+    requires :organization, type: Hash do 
+      requires :name, type: String, desc:'Organization Name'
+      optional :description, type:String, desc:'Organization Description'
+      optional :email, type: String, desc:'Organization Email'
+      optional :is_enabled, type: Boolean, desc:'Organization Status'
+    end
+  end
+  post '/organizations' do 
+    unless authorise? current_user, Organization, :manage_organization
+      error!({error: 'Not authorized to create an organization'}, 403)
+    end
+    org_params =  ActionController::Parameters.new(params).require(:organization).permit(:name, :description, :email, :is_enabled)
+    # Check if organization with same name already exists
+    if Organization.exists?(name: org_params[:name])
+      error!({error: 'An organization with this name already exists'}, 422)
+    end
+    organization = Organization.new(org_params)
+    
+    if organization.save
+      present organization, with: Entities::OrganizationEntity
+    else
+      error!({error: organization.errors.full_messages.join(', ')}, 422)
+    end
+  end
+
+
+  # Update an organization
+  desc 'Update an organization'
+  params do 
+    requires :organization, type: Hash do 
+      optional :name, type: String, desc:'Organization Name'
+      optional :description, type:String, desc:'Organization Description'
+      optional :email, type: String, desc:'Organization Email'
+      optional :is_enabled, type: Boolean, desc:'Organization Status'
+    end
+  end
+  put '/organizations/:id' do
+    organization = Organization.find(params[:id])
+    unless authorise? current_user, organization, :manage_organization
+      error!({error: 'Not authorized to update this organization'}, 403)
+    end
+    
+    org_params = ActionController::Parameters.new(params).require(:organization).permit(:name, :description, :email, :is_enabled)
+    
+    # Check if name is being changed and if it conflicts with existing org
+    if org_params[:name].present? && 
+       org_params[:name] != organization.name && 
+       Organization.where.not(id: params[:id]).exists?(name: org_params[:name])
+      error!({error: 'An organization with this name already exists'}, 422)
+    end
+    
+    if organization.update(org_params)
+      present organization, with: Entities::OrganizationEntity
+    else
+      error!({error: organization.errors.full_messages.join(', ')}, 422)
+    end
+  end
+  
+
+  # Delete an organization
+  desc 'Delete an organization'
+  delete '/organizations/:id' do
+    organization = Organization.find(params[:id])
+    unless authorise? current_user, organization, :manage_organization
+      error!({error: 'Not authorized to delete this organization'}, 403)
+    end
+    
+    # Check if organization has members
+    if organization.users.any?
+      error!({error: 'Cannot delete organization with members. Remove all members first.'}, 422)
+    end
+    
+    if organization.destroy
+      { success: true }
+    else
+      error!({error: organization.errors.full_messages.join(', ')}, 422)
+    end
+  end
+
+   #Add Memebr to Organization
+  desc 'Add a member to an organization'
+   params do
+    requires :user_id, type: Integer, desc: 'The ID of the user to add'
+   end
+   post '/organizations/:id/members' do
+    organization = Organization.find(params[:id])
+    unless authorise? current_user, organization, :manage_members
+        error!({error: 'Not Authorized to add members in this organization'}, 403)
+    end
+    user = User.find(params[:user_id])
+     # Check if user is already a member
+    if organization.users.include?(user)
+      error!({ error: 'User is already a member of this organization' }, 422)
+    end
+
+    organization.users << user 
+    present organization, with: Entities::OrganizationEntity
+  
+  end
+
+   #Organization Switching 
+   desc 'Set current organization for user'
+   params do
+     requires :organization_id, type: Integer, desc: 'The ID of the organization to set as current'
+   end
+   post '/users/current_organization' do
+     organization = Organization.find(params[:organization_id])
+     unless current_user.organizations.include?(organization)
+       error!({ error: 'User is not a member of this organization' }, 403)
+     end
+     
+     current_user.update(current_organization_id: organization.id)
+     present organization, with: Entities::OrganizationEntity
+   end
+
+   #Add members by searching their username , name or email
+   desc 'Search users to add to organization'
+   params do
+     requires :query, type: String, desc: 'Search query (username, name, email)'
+   end
+   get '/organizations/:id/search_users' do
+     organization = Organization.find(params[:id])
+     unless authorise? current_user, organization, :manage_members
+       error!({ error: 'Not authorized to search users for this organization' }, 403)
+     end
+     
+     # Search users not already in the organization
+     users = User.where("username LIKE :query OR first_name LIKE :query OR last_name LIKE :query OR email LIKE :query", 
+                        query: "%#{params[:query]}%")
+                 .where.not(id: organization.user_ids)
+                 .limit(20)
+     
+     present users, with: Entities::User
+   end
+
+  desc 'Remove a member from an organization'
+  delete '/organizations/:id/members/:user_id' do
+  organization = Organization.find(params[:id])
+  unless authorise? current_user, organization, :manage_members 
+    error!({error: 'Not Authorized to remove members from this organization'}, 403)
+  end
+  
+  user = User.find(params[:user_id])
+  user_org = UserOrganization.find_by(user_id: user.id, organization_id: organization.id)
+  if user_org
+    user_org.destroy
+    present organization, with: Entities::OrganizationEntity
+    else
+     error!({error: 'User is not a member of this organization'}, 404)
+    end
+  end
+
+  
\ No newline at end of file
diff --git a/app/models/organization.rb b/app/models/organization.rb
new file mode 100644
index 000000000..ac39bdf62
--- /dev/null
+++ b/app/models/organization.rb
@@ -0,0 +1,64 @@
+class Organization < ApplicationRecord
+  has_many :user_organizations, dependent: :destroy  
+  has_many :users, through: :user_organizations
+    
+  validates :name, presence: true, uniqueness: { case_sensitive: false }
+    
+  scope :enabled, -> { where(is_enabled: true) }
+    
+  def to_s
+    name
+  end
+
+  def self.permissions 
+    # what can admins do with organizations?
+    admin_role_permissions = [
+      :manage_organization,
+      :manage_members,
+      :view_members,
+      :view_enrolled_organizations
+    ]
+
+    # what can members do with organizations?
+    convenor_role_permissions = [
+      :view_members,
+      :manage_members,
+      :view_enrolled_organizations
+    ]
+
+    # what can tutors do with organizations?
+    tutor_role_permissions = [
+      :view_members,
+      :view_enrolled_organizations
+    ]
+
+    # what can auditors do with organizations?
+    auditor_role_permissions = [
+      :view_members,
+      :view_enrolled_organizations
+    ]
+
+    # what can students do with organizations?
+    students_role_permissions = [
+      :view_enrolled_organizations
+    ]
+    
+    # Return permissions hash
+    {
+      admin: admin_role_permissions,
+      convenor: convenor_role_permissions,
+      tutor: tutor_role_permissions,
+      auditor: auditor_role_permissions,
+      student: students_role_permissions
+    }
+  end
+  
+  def role_for(user)
+    # If user belongs to a specific organization, they get role
+    if users.include?(user)
+      user.role
+    else
+      nil
+    end
+  end
+end
\ No newline at end of file
diff --git a/app/models/user.rb b/app/models/user.rb
index 6e016badf..d4345ceb0 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -136,6 +136,8 @@ def token_for_text?(a_token)
   has_many    :projects, dependent: :destroy
   has_many    :auth_tokens, dependent: :destroy
   has_one     :webcal, dependent: :destroy
+  has_many    :user_organizations, dependent: :destroy
+  has_many    :organizations, through: :user_organizations
 
   # Model validations/constraints
   validates :first_name,  presence: true
diff --git a/app/models/user_organization.rb b/app/models/user_organization.rb
new file mode 100644
index 000000000..295317054
--- /dev/null
+++ b/app/models/user_organization.rb
@@ -0,0 +1,7 @@
+class UserOrganization < ApplicationRecord
+
+    belongs_to :user
+    belongs_to :organization
+    validates :user_id , uniqueness: { scope: :organization_id }
+
+end
\ No newline at end of file
diff --git a/db/migrate/20250417005019_create_organizations.rb b/db/migrate/20250417005019_create_organizations.rb
new file mode 100644
index 000000000..c8929b4c7
--- /dev/null
+++ b/db/migrate/20250417005019_create_organizations.rb
@@ -0,0 +1,20 @@
+class CreateOrganizations < ActiveRecord::Migration[7.1]
+  def change
+    create_table :organizations do |t|
+      t.string :name, null: false
+      t.string :description, limit: 1200
+      t.string :email
+      t.boolean :is_enabled, default: true
+
+      t.timestamps
+    end
+      add_index :organizations, :name, unique: true
+
+    create_table :user_organizations do |t|
+      t.references :user, null: false, foreign_key: true
+      t.references :organization, null: false, foreign_key: true
+      t.timestamps
+    end
+    add_index :user_organizations, [:user_id, :organization_id], unique: true
+  end
+end
diff --git a/db/migrate/20250421035348_add_current_organization_id_to_users.rb b/db/migrate/20250421035348_add_current_organization_id_to_users.rb
new file mode 100644
index 000000000..f1aa23393
--- /dev/null
+++ b/db/migrate/20250421035348_add_current_organization_id_to_users.rb
@@ -0,0 +1,5 @@
+class AddCurrentOrganizationIdToUsers < ActiveRecord::Migration[7.1]
+  def change
+    add_reference :users, :current_organization, foreign_key: { to_table: :organizations }
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 6daa71ebf..49f720b5c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2024_05_28_223908) do
+ActiveRecord::Schema[7.1].define(version: 2025_04_21_035348) do
   create_table "activity_types", charset: "utf8", collation: "utf8_unicode_ci", force: :cascade do |t|
     t.string "name", null: false
     t.string "abbreviation", null: false
@@ -139,6 +139,16 @@
     t.index ["user_id"], name: "index_logins_on_user_id"
   end
 
+  create_table "organizations", charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
+    t.string "name", null: false
+    t.string "description", limit: 1200
+    t.string "email"
+    t.boolean "is_enabled", default: true
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["name"], name: "index_organizations_on_name", unique: true
+  end
+
   create_table "overseer_assessments", charset: "utf8", collation: "utf8_unicode_ci", force: :cascade do |t|
     t.bigint "task_id", null: false
     t.string "submission_timestamp", null: false
@@ -480,6 +490,16 @@
     t.index ["teaching_period_id"], name: "index_units_on_teaching_period_id"
   end
 
+  create_table "user_organizations", charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
+    t.bigint "user_id", null: false
+    t.bigint "organization_id", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["organization_id"], name: "index_user_organizations_on_organization_id"
+    t.index ["user_id", "organization_id"], name: "index_user_organizations_on_user_id_and_organization_id", unique: true
+    t.index ["user_id"], name: "index_user_organizations_on_user_id"
+  end
+
   create_table "users", charset: "utf8", collation: "utf8_unicode_ci", force: :cascade do |t|
     t.string "email", default: "", null: false
     t.string "encrypted_password", default: "", null: false
@@ -509,6 +529,8 @@
     t.string "tii_eula_version"
     t.datetime "tii_eula_date"
     t.boolean "tii_eula_version_confirmed", default: false, null: false
+    t.bigint "current_organization_id"
+    t.index ["current_organization_id"], name: "index_users_on_current_organization_id"
     t.index ["login_id"], name: "index_users_on_login_id", unique: true
     t.index ["role_id"], name: "index_users_on_role_id"
   end
@@ -531,4 +553,7 @@
     t.index ["user_id"], name: "index_webcals_on_user_id", unique: true
   end
 
+  add_foreign_key "user_organizations", "organizations"
+  add_foreign_key "user_organizations", "users"
+  add_foreign_key "users", "organizations", column: "current_organization_id"
 end
diff --git a/docker-compose.yml b/docker-compose.yml
index 22520ccaa..5ffc919fe 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -71,3 +71,4 @@ services:
       MYSQL_PASSWORD: pwd
     volumes:
       - ../data/database:/var/lib/mysql
+