diff --git a/kmip/pie/client.py b/kmip/pie/client.py
index fa70ec2..6f85a62 100644
--- a/kmip/pie/client.py
+++ b/kmip/pie/client.py
@@ -506,6 +506,40 @@ class ProxyKmipClient(api.KmipClient):
             message = result.result_message.value
             raise exceptions.KmipOperationFailure(status, reason, message)
 
+    def activate(self, uid):
+        """
+        Activate a managed object stored by a KMIP appliance.
+
+        Args:
+            uid (string): The unique ID of the managed object to activate.
+
+        Returns:
+            None
+
+        Raises:
+            ClientConnectionNotOpen: if the client connection is unusable
+            KmipOperationFailure: if the operation result is a failure
+            TypeError: if the input argument is invalid
+        """
+        # Check input
+        if not isinstance(uid, six.string_types):
+            raise TypeError("uid must be a string")
+
+        # Verify that operations can be given at this time
+        if not self._is_open:
+            raise exceptions.ClientConnectionNotOpen()
+
+        # Activate the managed object and handle the results
+        result = self.proxy.activate(uid)
+
+        status = result.result_status.value
+        if status == enums.ResultStatus.SUCCESS:
+            return
+        else:
+            reason = result.result_reason.value
+            message = result.result_message.value
+            raise exceptions.KmipOperationFailure(status, reason, message)
+
     def destroy(self, uid):
         """
         Destroy a managed object stored by a KMIP appliance.
diff --git a/kmip/tests/unit/pie/test_client.py b/kmip/tests/unit/pie/test_client.py
index b3645a3..ee56906 100644
--- a/kmip/tests/unit/pie/test_client.py
+++ b/kmip/tests/unit/pie/test_client.py
@@ -884,6 +884,71 @@ class TestProxyKmipClient(testtools.TestCase):
         self.assertRaisesRegexp(
             KmipOperationFailure, error_msg, client.get_attribute_list, *args)
 
+    @mock.patch('kmip.pie.client.KMIPProxy',
+                mock.MagicMock(spec_set=KMIPProxy))
+    def test_activate(self):
+        """
+        Test that the client can activate a secret.
+        """
+        status = enums.ResultStatus.SUCCESS
+        result = results.OperationResult(contents.ResultStatus(status))
+
+        with ProxyKmipClient() as client:
+            client.proxy.activate.return_value = result
+            result = client.activate(
+                'aaaaaaaa-1111-2222-3333-ffffffffffff')
+            client.proxy.activate.assert_called_with(
+                'aaaaaaaa-1111-2222-3333-ffffffffffff')
+            self.assertEqual(None, result)
+
+    @mock.patch('kmip.pie.client.KMIPProxy',
+                mock.MagicMock(spec_set=KMIPProxy))
+    def test_activate_on_invalid_uid(self):
+        """
+        Test that a TypeError exception is raised when trying to activate a
+        secret with an invalid ID.
+        """
+        args = [0]
+        with ProxyKmipClient() as client:
+            self.assertRaises(TypeError, client.activate, *args)
+
+    @mock.patch('kmip.pie.client.KMIPProxy',
+                mock.MagicMock(spec_set=KMIPProxy))
+    def test_activate_on_closed(self):
+        """
+        Test that a ClientConnectionNotOpen exception is raised when trying
+        to activate a secret on an unopened client connection.
+        """
+        client = ProxyKmipClient()
+        args = ['aaaaaaaa-1111-2222-3333-ffffffffffff']
+        self.assertRaises(
+            ClientConnectionNotOpen, client.activate, *args)
+
+    @mock.patch('kmip.pie.client.KMIPProxy',
+                mock.MagicMock(spec_set=KMIPProxy))
+    def test_activate_on_operation_failure(self):
+        """
+        Test that a KmipOperationFailure exception is raised when the
+        backend fails to activate a secret.
+        """
+        status = enums.ResultStatus.OPERATION_FAILED
+        reason = enums.ResultReason.GENERAL_FAILURE
+        message = "Test failure message"
+
+        result = results.OperationResult(
+            contents.ResultStatus(status),
+            contents.ResultReason(reason),
+            contents.ResultMessage(message))
+        error_msg = str(KmipOperationFailure(status, reason, message))
+
+        client = ProxyKmipClient()
+        client.open()
+        client.proxy.activate.return_value = result
+        args = ['id']
+
+        self.assertRaisesRegexp(
+            KmipOperationFailure, error_msg, client.activate, *args)
+
     @mock.patch('kmip.pie.client.KMIPProxy',
                 mock.MagicMock(spec_set=KMIPProxy))
     def test_destroy(self):