diff --git a/app/controllers/groups/work_items_controller.rb b/app/controllers/groups/work_items_controller.rb
new file mode 100644
index 00000000000..d1e15c81471
--- /dev/null
+++ b/app/controllers/groups/work_items_controller.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Groups
+  class WorkItemsController < Groups::ApplicationController
+    feature_category :team_planning
+
+    def index
+      not_found unless Feature.enabled?(:namespace_level_work_items, group)
+    end
+  end
+end
diff --git a/app/views/groups/work_items/index.html.haml b/app/views/groups/work_items/index.html.haml
new file mode 100644
index 00000000000..9aa90b913a2
--- /dev/null
+++ b/app/views/groups/work_items/index.html.haml
@@ -0,0 +1 @@
+- page_title s_('WorkItem|Work items')
diff --git a/config/feature_flags/development/namespace_level_work_items.yml b/config/feature_flags/development/namespace_level_work_items.yml
new file mode 100644
index 00000000000..794e56cf425
--- /dev/null
+++ b/config/feature_flags/development/namespace_level_work_items.yml
@@ -0,0 +1,8 @@
+---
+name: namespace_level_work_items
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/127124
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/419186
+milestone: '16.3'
+type: development
+group: group::project management
+default_enabled: false
diff --git a/config/routes/group.rb b/config/routes/group.rb
index 9b346867f78..16371fca89e 100644
--- a/config/routes/group.rb
+++ b/config/routes/group.rb
@@ -160,6 +160,8 @@ constraints(::Constraints::GroupUrlConstrainer.new) do
     end
 
     resources :achievements, only: [:index, :new, :edit]
+
+    resources :work_items, only: [:index]
   end
 
   scope(
diff --git a/db/post_migrate/20230718020825_swap_events_target_id_to_bigint_for_gitlab_dot_com.rb b/db/post_migrate/20230718020825_swap_events_target_id_to_bigint_for_gitlab_dot_com.rb
new file mode 100644
index 00000000000..03e95e39649
--- /dev/null
+++ b/db/post_migrate/20230718020825_swap_events_target_id_to_bigint_for_gitlab_dot_com.rb
@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+class SwapEventsTargetIdToBigintForGitlabDotCom < Gitlab::Database::Migration[2.1]
+  include Gitlab::Database::MigrationHelpers::ConvertToBigint
+
+  disable_ddl_transaction!
+
+  TABLE_NAME = 'events'
+
+  def up
+    return unless should_run?
+
+    swap
+  end
+
+  def down
+    return unless should_run?
+
+    swap
+  end
+
+  def swap
+    # This will replace the existing index_events_on_target_type_and_target_id_and_fingerprint
+    add_concurrent_index TABLE_NAME, [:target_type, :target_id_convert_to_bigint, :fingerprint],
+      name: :index_events_on_target_type_and_target_id_bigint_fingerprint,
+      unique: true
+
+    with_lock_retries(raise_on_exhaustion: true) do
+      execute "LOCK TABLE #{TABLE_NAME} IN ACCESS EXCLUSIVE MODE"
+
+      execute "ALTER TABLE #{TABLE_NAME} RENAME COLUMN target_id TO target_id_tmp"
+      execute "ALTER TABLE #{TABLE_NAME} RENAME COLUMN target_id_convert_to_bigint TO target_id"
+      execute "ALTER TABLE #{TABLE_NAME} RENAME COLUMN target_id_tmp TO target_id_convert_to_bigint"
+
+      function_name = Gitlab::Database::UnidirectionalCopyTrigger
+        .on_table(TABLE_NAME, connection: connection)
+        .name(:target_id, :target_id_convert_to_bigint)
+      execute "ALTER FUNCTION #{quote_table_name(function_name)} RESET ALL"
+
+      execute 'DROP INDEX IF EXISTS index_events_on_target_type_and_target_id_and_fingerprint'
+      rename_index TABLE_NAME, 'index_events_on_target_type_and_target_id_bigint_fingerprint',
+        'index_events_on_target_type_and_target_id_and_fingerprint'
+    end
+  end
+
+  def should_run?
+    com_or_dev_or_test_but_not_jh?
+  end
+end
diff --git a/db/schema_migrations/20230718020825 b/db/schema_migrations/20230718020825
new file mode 100644
index 00000000000..dda10a5fbfc
--- /dev/null
+++ b/db/schema_migrations/20230718020825
@@ -0,0 +1 @@
+07d465dbd1b81bd388516b78e75cfeb890e6166e6b8cab23254a9a79a4de60c5
\ No newline at end of file
diff --git a/db/structure.sql b/db/structure.sql
index 53a027cb5b5..fadea9e1403 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -15933,7 +15933,7 @@ ALTER SEQUENCE error_tracking_errors_id_seq OWNED BY error_tracking_errors.id;
 CREATE TABLE events (
     project_id integer,
     author_id integer NOT NULL,
-    target_id integer,
+    target_id_convert_to_bigint integer,
     created_at timestamp with time zone NOT NULL,
     updated_at timestamp with time zone NOT NULL,
     action smallint NOT NULL,
@@ -15941,7 +15941,7 @@ CREATE TABLE events (
     group_id bigint,
     fingerprint bytea,
     id bigint NOT NULL,
-    target_id_convert_to_bigint bigint,
+    target_id bigint,
     CONSTRAINT check_97e06e05ad CHECK ((octet_length(fingerprint) <= 128))
 );
 
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 4ce4fb6fa1c..08b413f1d64 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -52559,6 +52559,9 @@ msgstr ""
 msgid "WorkItem|Work item not found"
 msgstr ""
 
+msgid "WorkItem|Work items"
+msgstr ""
+
 msgid "WorkItem|You're only seeing %{boldStart}other activity%{boldEnd} in the feed. To add a comment, switch to one of the following options."
 msgstr ""
 
diff --git a/spec/migrations/swap_events_target_id_to_bigint_for_gitlab_dot_com_spec.rb b/spec/migrations/swap_events_target_id_to_bigint_for_gitlab_dot_com_spec.rb
new file mode 100644
index 00000000000..a3dc73ecc38
--- /dev/null
+++ b/spec/migrations/swap_events_target_id_to_bigint_for_gitlab_dot_com_spec.rb
@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require_migration!
+
+RSpec.describe SwapEventsTargetIdToBigintForGitlabDotCom, feature_category: :database do
+  describe '#up' do
+    before do
+      # A we call `schema_migrate_down!` before each example, and for this migration
+      # `#down` is same as `#up`, we need to ensure we start from the expected state.
+      connection = described_class.new.connection
+      connection.execute('ALTER TABLE events ALTER COLUMN target_id TYPE integer')
+      connection.execute('ALTER TABLE events ALTER COLUMN target_id_convert_to_bigint TYPE bigint')
+    end
+
+    # rubocop: disable RSpec/AnyInstanceOf
+    it 'swaps the integer and bigint columns for GitLab.com, dev, or test' do
+      allow_any_instance_of(described_class).to receive(:com_or_dev_or_test_but_not_jh?).and_return(true)
+
+      events = table(:events)
+
+      disable_migrations_output do
+        reversible_migration do |migration|
+          migration.before -> {
+            events.reset_column_information
+
+            expect(events.columns.find { |c| c.name == 'target_id' }.sql_type).to eq('integer')
+            expect(events.columns.find { |c| c.name == 'target_id_convert_to_bigint' }.sql_type).to eq('bigint')
+          }
+
+          migration.after -> {
+            events.reset_column_information
+
+            expect(events.columns.find { |c| c.name == 'target_id' }.sql_type).to eq('bigint')
+            expect(events.columns.find { |c| c.name == 'target_id_convert_to_bigint' }.sql_type)
+              .to eq('integer')
+          }
+        end
+      end
+    end
+
+    it 'is a no-op for other instances' do
+      allow_any_instance_of(described_class).to receive(:com_or_dev_or_test_but_not_jh?).and_return(false)
+
+      events = table(:events)
+
+      disable_migrations_output do
+        reversible_migration do |migration|
+          migration.before -> {
+            events.reset_column_information
+
+            expect(events.columns.find { |c| c.name == 'target_id' }.sql_type).to eq('integer')
+            expect(events.columns.find { |c| c.name == 'target_id_convert_to_bigint' }.sql_type).to eq('bigint')
+          }
+
+          migration.after -> {
+            events.reset_column_information
+
+            expect(events.columns.find { |c| c.name == 'target_id' }.sql_type).to eq('integer')
+            expect(events.columns.find { |c| c.name == 'target_id_convert_to_bigint' }.sql_type).to eq('bigint')
+          }
+        end
+      end
+    end
+    # rubocop: enable RSpec/AnyInstanceOf
+  end
+end
diff --git a/spec/requests/groups/work_items_controller_spec.rb b/spec/requests/groups/work_items_controller_spec.rb
new file mode 100644
index 00000000000..c47b3f03ec1
--- /dev/null
+++ b/spec/requests/groups/work_items_controller_spec.rb
@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Group Level Work Items', feature_category: :team_planning do
+  let_it_be(:group) { create(:group, :private) }
+  let_it_be(:project) { create(:project, group: group) }
+  let_it_be(:developer) { create(:user).tap { |u| group.add_developer(u) } }
+
+  describe 'GET /groups/:group/-/work_items' do
+    let(:work_items_path) { url_for(controller: 'groups/work_items', action: :index, group_id: group.full_path) }
+
+    before do
+      sign_in(current_user)
+    end
+
+    context 'when the user can read the group' do
+      let(:current_user) { developer }
+
+      it 'renders index' do
+        get work_items_path
+
+        expect(response).to have_gitlab_http_status(:ok)
+      end
+
+      context 'when the namespace_level_work_items feature flag is disabled' do
+        before do
+          stub_feature_flags(namespace_level_work_items: false)
+        end
+
+        it 'returns not found' do
+          get work_items_path
+
+          expect(response).to have_gitlab_http_status(:not_found)
+        end
+      end
+    end
+
+    context 'when the user cannot read the group' do
+      let(:current_user) { create(:user) }
+
+      it 'returns not found' do
+        get work_items_path
+
+        expect(response).to have_gitlab_http_status(:not_found)
+      end
+    end
+  end
+end