diff --git a/src/clusterfuzz/_internal/cron/oss_fuzz_cc_groups.py b/src/clusterfuzz/_internal/cron/oss_fuzz_cc_groups.py
new file mode 100644
index 00000000000..8303487d05b
--- /dev/null
+++ b/src/clusterfuzz/_internal/cron/oss_fuzz_cc_groups.py
@@ -0,0 +1,73 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Cron to sync OSS-Fuzz projects groups used as CC in the issue tracker."""
+
+from clusterfuzz._internal.base import utils
+from clusterfuzz._internal.cron import project_setup
+from clusterfuzz._internal.google_cloud_utils import google_groups
+from clusterfuzz._internal.metrics import logs
+
+_CC_GROUP_SUFFIX = '-ccs@oss-fuzz.com'
+_CC_GROUP_DESC = 'External CCs in OSS-Fuzz issue tracker for project'
+
+
+def sync_project_cc_group(project_name, info):
+  """Sync the project's google group used for CCing in the issue tracker."""
+  group_name = f'{project_name}{_CC_GROUP_SUFFIX}'
+
+  group_id = google_groups.get_group_id(group_name)
+  # Create the group and bail out since the CIG API might delay to create a
+  # new group. Add members will be done in the next project-setup run.
+  if not group_id:
+    group_description = f'{_CC_GROUP_DESC}: {project_name}'
+    created = google_groups.create_google_group(
+        group_name, group_description=group_description)
+    if not created:
+      logs.info('Failed to create or retrieve the issue tracker CC group '
+                f'for {project_name}')
+      return
+    logs.info(f'Created issue tracker CC group for {project_name}. '
+              'Skipping adding members as group may still not exist.')
+    return
+
+  group_memberships = google_groups.get_google_group_memberships(group_id)
+  if group_memberships is None:
+    logs.info(
+        f'Failed to get list of group members for {project_name}. Skipping.')
+    return
+
+  ccs = set(project_setup.ccs_from_info(info))
+
+  to_add = ccs - group_memberships.keys()
+  for member in to_add:
+    google_groups.add_member_to_group(group_id, member)
+
+  to_delete = group_memberships.keys() - ccs
+  for member in to_delete:
+    # Ignore the SA that created the group from members to delete.
+    if utils.is_service_account(member):
+      continue
+    memebership_name = group_memberships[member]
+    google_groups.delete_google_group_membership(group_id, member,
+                                                 memebership_name)
+
+
+def main():
+  """Sync OSS-Fuzz projects groups used to CC owners in the issue tracker."""
+  projects = project_setup.get_oss_fuzz_projects()
+  for project, info in projects:
+    sync_project_cc_group(project, info)
+
+  logs.info('OSS-Fuzz CC groups sync succeeded.')
+  return True
diff --git a/src/clusterfuzz/_internal/tests/appengine/handlers/cron/oss_fuzz_cc_groups_test.py b/src/clusterfuzz/_internal/tests/appengine/handlers/cron/oss_fuzz_cc_groups_test.py
new file mode 100644
index 00000000000..8a3f945dac7
--- /dev/null
+++ b/src/clusterfuzz/_internal/tests/appengine/handlers/cron/oss_fuzz_cc_groups_test.py
@@ -0,0 +1,106 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Tests for oss_fuzz_cc_groups cron."""
+
+import unittest
+
+from clusterfuzz._internal.cron import oss_fuzz_cc_groups
+from clusterfuzz._internal.tests.test_libs import helpers as test_helpers
+
+
+class OssFuzzCcGroupsTest(unittest.TestCase):
+  """Tests for oss_fuzz_cc_groups."""
+
+  def setUp(self):
+    test_helpers.patch(self, [
+        'clusterfuzz._internal.cron.project_setup.get_oss_fuzz_projects',
+        'clusterfuzz._internal.cron.project_setup.ccs_from_info',
+        'clusterfuzz._internal.google_cloud_utils.google_groups.get_group_id',
+        'clusterfuzz._internal.google_cloud_utils.google_groups.create_google_group',
+        'clusterfuzz._internal.google_cloud_utils.google_groups.get_google_group_memberships',
+        'clusterfuzz._internal.google_cloud_utils.google_groups.add_member_to_group',
+        'clusterfuzz._internal.google_cloud_utils.google_groups.delete_google_group_membership',
+        'clusterfuzz._internal.base.utils.is_service_account',
+    ])
+
+  def test_main(self):
+    """Test main execution for creating groups and syncing project ccs."""
+    self.mock.get_oss_fuzz_projects.return_value = [
+        ('project1', {
+            'info': 1
+        }),
+        ('project2', {
+            'info': 2
+        }),
+    ]
+
+    # project1 group does not exist, so create it.
+    # project2 group exists, only sync members.
+    self.mock.get_group_id.side_effect = [None, 'group2_id']
+    self.mock.create_google_group.return_value = True
+
+    self.mock.get_google_group_memberships.return_value = {
+        'member1@example.com': 'membership1',
+        'member2@example.com': 'membership2',
+    }
+    self.mock.ccs_from_info.return_value = [
+        'member2@example.com',
+        'member3@example.com',
+    ]
+    self.mock.is_service_account.return_value = False
+
+    self.assertTrue(oss_fuzz_cc_groups.main())
+
+    # project1 check
+    self.mock.create_google_group.assert_called_with(
+        'project1-ccs@oss-fuzz.com',
+        group_description=(
+            'External CCs in OSS-Fuzz issue tracker for project: project1'))
+
+    # project2 check
+    self.mock.add_member_to_group.assert_called_with('group2_id',
+                                                     'member3@example.com')
+    self.mock.delete_google_group_membership.assert_called_with(
+        'group2_id', 'member1@example.com', 'membership1')
+
+  def test_create_fail(self):
+    """Test group creation failure."""
+    self.mock.get_oss_fuzz_projects.return_value = [('project1', {})]
+    self.mock.get_group_id.return_value = None
+    self.mock.create_google_group.return_value = False
+
+    self.assertTrue(oss_fuzz_cc_groups.main())
+    self.mock.get_google_group_memberships.assert_not_called()
+
+  def test_get_memberships_fail(self):
+    """Test get memberships failure."""
+    self.mock.get_oss_fuzz_projects.return_value = [('project1', {})]
+    self.mock.get_group_id.return_value = 'group1_id'
+    self.mock.get_google_group_memberships.return_value = None
+
+    self.assertTrue(oss_fuzz_cc_groups.main())
+    self.mock.ccs_from_info.assert_not_called()
+
+  def test_skip_sa_deletion(self):
+    """Test that service accounts are not deleted from group."""
+    self.mock.get_oss_fuzz_projects.return_value = [('project1', {})]
+    self.mock.get_group_id.return_value = 'group1_id'
+    self.mock.get_google_group_memberships.return_value = {
+        'sa@serviceaccount.com': 'membership_sa',
+    }
+    self.mock.ccs_from_info.return_value = []
+    self.mock.is_service_account.return_value = True
+
+    self.assertTrue(oss_fuzz_cc_groups.main())
+    self.mock.delete_google_group_membership.assert_not_called()