diff --git a/tests/unit/vertex_langchain/test_reasoning_engines.py b/tests/unit/vertex_langchain/test_reasoning_engines.py
index 019dc214d9..d9e785b8d6 100644
--- a/tests/unit/vertex_langchain/test_reasoning_engines.py
+++ b/tests/unit/vertex_langchain/test_reasoning_engines.py
@@ -42,6 +42,7 @@
 from vertexai.preview import reasoning_engines
 from vertexai.reasoning_engines import _reasoning_engines
 from vertexai.reasoning_engines import _utils
+from google.iam.v1 import policy_pb2
 from google.api import httpbody_pb2
 from google.protobuf import field_mask_pb2
 from google.protobuf import struct_pb2
@@ -794,6 +795,56 @@ def test_create_reasoning_engine(
             retry=_TEST_RETRY,
         )
 
+    def test_get_iam_policy(self):
+        """Tests that `get_iam_policy` method correctly calls the underlying API client.
+
+        It verifies that the `get_iam_policy` method is called with the expected
+        resource name and returns the policy as provided by the mocked API client.
+        """
+        with mock.patch.object(
+            base.VertexAiResourceNoun, "_get_gca_resource"
+        ) as mock_get_gca_resource:
+            mock_get_gca_resource.return_value = types.ReasoningEngine(
+                name=_TEST_REASONING_ENGINE_RESOURCE_NAME
+            )
+            reasoning_engine = reasoning_engines.ReasoningEngine(
+                _TEST_REASONING_ENGINE_RESOURCE_NAME
+            )
+
+        test_policy = policy_pb2.Policy(version=1)
+        with mock.patch.object(
+            reasoning_engine.api_client, "get_iam_policy"
+        ) as mock_get_iam_policy:
+            mock_get_iam_policy.return_value = test_policy
+            policy = reasoning_engine.get_iam_policy(policy_version=1)
+            mock_get_iam_policy.assert_called_once()
+            assert policy == test_policy
+
+    def test_set_iam_policy(self):
+        """Tests that `set_iam_policy` method correctly calls the underlying API client.
+
+        It verifies that the `set_iam_policy` method is called with the expected
+        policy and returns the policy as provided by the mocked API client.
+        """
+        with mock.patch.object(
+            base.VertexAiResourceNoun, "_get_gca_resource"
+        ) as mock_get_gca_resource:
+            mock_get_gca_resource.return_value = types.ReasoningEngine(
+                name=_TEST_REASONING_ENGINE_RESOURCE_NAME
+            )
+            reasoning_engine = reasoning_engines.ReasoningEngine(
+                _TEST_REASONING_ENGINE_RESOURCE_NAME
+            )
+
+        test_policy = policy_pb2.Policy(version=1)
+        with mock.patch.object(
+            reasoning_engine.api_client, "set_iam_policy"
+        ) as mock_set_iam_policy:
+            mock_set_iam_policy.return_value = test_policy
+            policy = reasoning_engine.set_iam_policy(test_policy)
+            mock_set_iam_policy.assert_called_once()
+            assert policy == test_policy
+
     @pytest.mark.usefixtures("caplog")
     def test_create_reasoning_engine_warn_resource_name(
         self,
diff --git a/vertexai/reasoning_engines/_reasoning_engines.py b/vertexai/reasoning_engines/_reasoning_engines.py
index 322bf2a2d4..9c36be6f1a 100644
--- a/vertexai/reasoning_engines/_reasoning_engines.py
+++ b/vertexai/reasoning_engines/_reasoning_engines.py
@@ -44,6 +44,9 @@
 from google.cloud.aiplatform_v1beta1 import types as aip_types
 from google.cloud.aiplatform_v1beta1.types import reasoning_engine_service
 from vertexai.reasoning_engines import _utils
+from google.iam.v1 import iam_policy_pb2
+from google.iam.v1 import options_pb2
+from google.iam.v1 import policy_pb2
 from google.protobuf import field_mask_pb2
 
 
@@ -499,6 +502,41 @@ def operation_schemas(self) -> Sequence[_utils.JsonDict]:
             self._operation_schemas = spec.get("classMethods", [])
         return self._operation_schemas
 
+    def get_iam_policy(
+            self, policy_version: Optional[int] = None
+        ) -> policy_pb2.Policy:
+        """Gets the access control policy for this ReasoningEngine.
+
+            Args:
+                policy_version: Optional. The maximum policy version that will be used
+                to format the policy. Valid values are 0, 1, 3.
+
+            Returns:
+                The IAM policy.
+            """
+        request = iam_policy_pb2.GetIamPolicyRequest(
+                resource=self.resource_name,
+                options=options_pb2.GetPolicyOptions(
+                    requested_policy_version=policy_version
+                ),
+            )
+        return self.api_client.get_iam_policy(request=request)
+
+    def set_iam_policy(self, policy: policy_pb2.Policy) -> policy_pb2.Policy:
+        """Sets the access control policy on this ReasoningEngine.
+
+        Args:
+            policy: The complete policy to be applied to the resource.
+
+        Returns:
+            The new IAM policy.
+        """
+        request = iam_policy_pb2.SetIamPolicyRequest(
+            resource=self.resource_name,
+            policy=policy,
+        )
+        return self.api_client.set_iam_policy(request=request)
+
 
 def _validate_sys_version_or_raise(sys_version: str) -> None:
     """Tries to validate the python system version."""