diff --git a/mpt_api_client/resources/accounts/accounts_user_groups.py b/mpt_api_client/resources/accounts/accounts_user_groups.py
new file mode 100644
index 00000000..b0ca2504
--- /dev/null
+++ b/mpt_api_client/resources/accounts/accounts_user_groups.py
@@ -0,0 +1,42 @@
+from mpt_api_client.http import AsyncService, Service
+from mpt_api_client.http.mixins import (
+    AsyncCreateMixin,
+    AsyncDeleteMixin,
+    AsyncUpdateMixin,
+    CreateMixin,
+    DeleteMixin,
+    UpdateMixin,
+)
+from mpt_api_client.models import Model
+
+
+class AccountsUserGroup(Model):
+    """Account User Group Model."""
+
+
+class AccountsUserGroupsServiceConfig:
+    """Account User Groups Service Configuration."""
+
+    _endpoint = "/public/v1/accounts/{account_id}/users/{user_id}/groups"
+    _model_class = AccountsUserGroup
+    _collection_key = "data"
+
+
+class AccountsUserGroupsService(
+    UpdateMixin[AccountsUserGroup],
+    DeleteMixin,
+    CreateMixin[AccountsUserGroup],
+    Service[AccountsUserGroup],
+    AccountsUserGroupsServiceConfig,
+):
+    """Account User Groups Service."""
+
+
+class AsyncAccountsUserGroupsService(
+    AsyncUpdateMixin[AccountsUserGroup],
+    AsyncDeleteMixin,
+    AsyncCreateMixin[AccountsUserGroup],
+    AsyncService[AccountsUserGroup],
+    AccountsUserGroupsServiceConfig,
+):
+    """Asynchronous Account User Groups Service."""
diff --git a/mpt_api_client/resources/accounts/accounts_users.py b/mpt_api_client/resources/accounts/accounts_users.py
index d46e451c..55b494af 100644
--- a/mpt_api_client/resources/accounts/accounts_users.py
+++ b/mpt_api_client/resources/accounts/accounts_users.py
@@ -8,6 +8,10 @@
     UpdateMixin,
 )
 from mpt_api_client.models import Model
+from mpt_api_client.resources.accounts.accounts_user_groups import (
+    AccountsUserGroupsService,
+    AsyncAccountsUserGroupsService,
+)
 from mpt_api_client.resources.accounts.mixins import (
     AsyncInvitableMixin,
     InvitableMixin,
@@ -21,7 +25,7 @@ class AccountsUser(Model):
 class AccountsUsersServiceConfig:
     """Account Users Service Configuration."""
 
-    _endpoint = "/public/v1/accounts/accounts/{account_id}/users"
+    _endpoint = "/public/v1/accounts/{account_id}/users"
     _model_class = AccountsUser
     _collection_key = "data"
 
@@ -36,6 +40,16 @@ class AccountsUsersService(
 ):
     """Account Users Service."""
 
+    def groups(self, user_id: str) -> AccountsUserGroupsService:
+        """Return account user groups service."""
+        return AccountsUserGroupsService(
+            http_client=self.http_client,
+            endpoint_params={
+                "account_id": self.endpoint_params["account_id"],
+                "user_id": user_id,
+            },
+        )
+
 
 class AsyncAccountsUsersService(
     AsyncUpdateMixin[AccountsUser],
@@ -46,3 +60,13 @@ class AsyncAccountsUsersService(
     AccountsUsersServiceConfig,
 ):
     """Asynchronous Account Users Service."""
+
+    def groups(self, user_id: str) -> AsyncAccountsUserGroupsService:
+        """Return account user groups service."""
+        return AsyncAccountsUserGroupsService(
+            http_client=self.http_client,
+            endpoint_params={
+                "account_id": self.endpoint_params["account_id"],
+                "user_id": user_id,
+            },
+        )
diff --git a/tests/resources/accounts/test_accounts_user_groups.py b/tests/resources/accounts/test_accounts_user_groups.py
new file mode 100644
index 00000000..6cd240d2
--- /dev/null
+++ b/tests/resources/accounts/test_accounts_user_groups.py
@@ -0,0 +1,52 @@
+import pytest
+
+from mpt_api_client.resources.accounts.accounts_user_groups import (
+    AccountsUserGroupsService,
+    AsyncAccountsUserGroupsService,
+)
+
+
+@pytest.fixture
+def accounts_user_groups_service(http_client):
+    return AccountsUserGroupsService(
+        http_client=http_client,
+        endpoint_params={"account_id": "ACC-0000-0001", "user_id": "USR-0000-0001"},
+    )
+
+
+@pytest.fixture
+def async_accounts_user_groups_service(async_http_client):
+    return AsyncAccountsUserGroupsService(
+        http_client=async_http_client,
+        endpoint_params={"account_id": "ACC-0000-0001", "user_id": "USR-0000-0001"},
+    )
+
+
+def test_endpoint(accounts_user_groups_service):
+    assert (
+        accounts_user_groups_service.endpoint
+        == "/public/v1/accounts/ACC-0000-0001/users/USR-0000-0001/groups"
+    )
+
+
+def test_async_endpoint(async_accounts_user_groups_service):
+    assert (
+        async_accounts_user_groups_service.endpoint
+        == "/public/v1/accounts/ACC-0000-0001/users/USR-0000-0001/groups"
+    )
+
+
+@pytest.mark.parametrize(
+    "method",
+    ["create", "update", "delete"],
+)
+def test_mixins_present(accounts_user_groups_service, method):
+    assert hasattr(accounts_user_groups_service, method)
+
+
+@pytest.mark.parametrize(
+    "method",
+    ["create", "update", "delete"],
+)
+def test_async_mixins_present(async_accounts_user_groups_service, method):
+    assert hasattr(async_accounts_user_groups_service, method)
diff --git a/tests/resources/accounts/test_accounts_users.py b/tests/resources/accounts/test_accounts_users.py
index e0f428b6..edb3e41f 100644
--- a/tests/resources/accounts/test_accounts_users.py
+++ b/tests/resources/accounts/test_accounts_users.py
@@ -1,5 +1,9 @@
 import pytest
 
+from mpt_api_client.resources.accounts.accounts_user_groups import (
+    AccountsUserGroupsService,
+    AsyncAccountsUserGroupsService,
+)
 from mpt_api_client.resources.accounts.accounts_users import (
     AccountsUsersService,
     AsyncAccountsUsersService,
@@ -21,13 +25,11 @@ def async_accounts_users_service(async_http_client):
 
 
 def test_endpoint(accounts_users_service):
-    assert accounts_users_service.endpoint == "/public/v1/accounts/accounts/ACC-0000-0001/users"
+    assert accounts_users_service.endpoint == "/public/v1/accounts/ACC-0000-0001/users"
 
 
 def test_async_endpoint(async_accounts_users_service):
-    assert (
-        async_accounts_users_service.endpoint == "/public/v1/accounts/accounts/ACC-0000-0001/users"
-    )
+    assert async_accounts_users_service.endpoint == "/public/v1/accounts/ACC-0000-0001/users"
 
 
 @pytest.mark.parametrize(
@@ -44,3 +46,33 @@ def test_methods_present(accounts_users_service, method):
 )
 def test_async_methods_present(async_accounts_users_service, method):
     assert hasattr(async_accounts_users_service, method)
+
+
+@pytest.mark.parametrize(
+    ("service_method", "expected_service_class"),
+    [("groups", AccountsUserGroupsService)],
+)
+def test_property_services(accounts_users_service, service_method, expected_service_class):
+    service = getattr(accounts_users_service, service_method)("USR-0000-0001")
+
+    assert isinstance(service, expected_service_class)
+    assert service.endpoint_params == {
+        "account_id": "ACC-0000-0001",
+        "user_id": "USR-0000-0001",
+    }
+
+
+@pytest.mark.parametrize(
+    ("service_method", "expected_service_class"),
+    [("groups", AsyncAccountsUserGroupsService)],
+)
+def test_async_property_services(
+    async_accounts_users_service, service_method, expected_service_class
+):
+    service = getattr(async_accounts_users_service, service_method)("USR-0000-0001")
+
+    assert isinstance(service, expected_service_class)
+    assert service.endpoint_params == {
+        "account_id": "ACC-0000-0001",
+        "user_id": "USR-0000-0001",
+    }