diff --git a/ci/cloudbuild/builds/integration-daily.sh b/ci/cloudbuild/builds/integration-daily.sh
index a56e6cfe82a58..e007ed7db1f29 100755
--- a/ci/cloudbuild/builds/integration-daily.sh
+++ b/ci/cloudbuild/builds/integration-daily.sh
@@ -48,11 +48,11 @@ integration::bazel_with_emulators test "${args[@]}" "${integration_args[@]}"
 
 io::log_h2 "Running Bigtable integration tests (against prod)"
 bazel test "${args[@]}" "${integration_args[@]}" \
-  --test_tag_filters="integration-test" -- \
+  --test_tag_filters="integration-test,-ud-only" -- \
   "//google/cloud/bigtable/..." \
   "-//google/cloud/bigtable/examples:bigtable_grpc_credentials"
 
 io::log_h2 "Running Spanner integration tests (against prod)"
 bazel test "${args[@]}" "${integration_args[@]}" \
-  --test_tag_filters="integration-test" --test_timeout=-1,-1,-1,10800 \
+  --test_tag_filters="integration-test,-ud-only" --test_timeout=-1,-1,-1,10800 \
   "//google/cloud/spanner/..."
diff --git a/ci/cloudbuild/builds/integration-production.sh b/ci/cloudbuild/builds/integration-production.sh
index b487db626dee2..fb92d5665573c 100755
--- a/ci/cloudbuild/builds/integration-production.sh
+++ b/ci/cloudbuild/builds/integration-production.sh
@@ -40,5 +40,5 @@ excluded_rules=(
 io::log_h2 "Running the integration tests against prod"
 mapfile -t integration_args < <(integration::bazel_args)
 io::run bazel test "${args[@]}" "${integration_args[@]}" \
-  --cache_test_results="auto" --test_tag_filters="integration-test" \
+  --cache_test_results="auto" --test_tag_filters="integration-test,-ud-only" \
   -- "${BAZEL_TARGETS[@]}" "${excluded_rules[@]}"
diff --git a/ci/cloudbuild/builds/lib/integration.sh b/ci/cloudbuild/builds/lib/integration.sh
index b9399634db520..73da705584dff 100644
--- a/ci/cloudbuild/builds/lib/integration.sh
+++ b/ci/cloudbuild/builds/lib/integration.sh
@@ -178,30 +178,30 @@ function integration::bazel_with_emulators() {
     "google/cloud:internal_unified_rest_credentials_integration_test"
   )
 
-  production_tests_tag_filters="integration-test"
+  production_tests_tag_filters="integration-test,-ud-only"
   if echo "${args[@]}" | grep -w -q -- "--config=msan"; then
-    production_tests_tag_filters="integration-test,-no-msan"
+    production_tests_tag_filters="integration-test,-no-msan,-ud-only"
   fi
 
   io::log_h2 "Running Pub/Sub integration tests (with emulator)"
   "google/cloud/pubsub/ci/${EMULATOR_SCRIPT}" \
-    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test"
+    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test,-ud-only"
 
   io::log_h2 "Running Storage integration tests (with emulator)"
   "google/cloud/storage/ci/${EMULATOR_SCRIPT}" \
-    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test"
+    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test,-ud-only"
 
   io::log_h2 "Running Spanner integration tests (with emulator)"
   "google/cloud/spanner/ci/${EMULATOR_SCRIPT}" \
-    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test"
+    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test,-ud-only"
 
   io::log_h2 "Running Bigtable integration tests (with emulator)"
   "google/cloud/bigtable/ci/${EMULATOR_SCRIPT}" \
-    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test"
+    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test,-ud-only"
 
   io::log_h2 "Running REST integration tests (with emulator)"
   "google/cloud/internal/ci/${EMULATOR_SCRIPT}" \
-    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test"
+    bazel "${verb}" "${args[@]}" --test_tag_filters="integration-test,-ud-only"
 
   if [[ "${BAZEL_TARGETS[*]}" != "..." ]]; then
     io::log_h2 "Skipping some integration tests because BAZEL_TARGETS is not the default"
diff --git a/ci/cloudbuild/builds/lib/universe_domain.sh b/ci/cloudbuild/builds/lib/universe_domain.sh
index 728c9a7bdb270..3ee0ec130f802 100644
--- a/ci/cloudbuild/builds/lib/universe_domain.sh
+++ b/ci/cloudbuild/builds/lib/universe_domain.sh
@@ -43,5 +43,7 @@ function ud::bazel_test() {
   bazel test "${args[@]}" --sandbox_add_mount_pair=/tmp \
     --test_env=UD_SA_KEY_FILE="${UD_SA_KEY_FILE}" \
     --test_env=UD_REGION="${UD_REGION}" \
+    --test_env=UD_ZONE="${UD_ZONE}" \
+    --test_env=UD_IMPERSONATED_SERVICE_ACCOUNT_NAME="${UD_IMPERSONATED_SERVICE_ACCOUNT_NAME}" \
     --test_env=UD_PROJECT="${UD_PROJECT}" -- "$@"
 }
diff --git a/ci/cloudbuild/builds/universe-domain-demo.sh b/ci/cloudbuild/builds/universe-domain-demo.sh
index 02aace8d2f777..9877b3574cf0b 100755
--- a/ci/cloudbuild/builds/universe-domain-demo.sh
+++ b/ci/cloudbuild/builds/universe-domain-demo.sh
@@ -29,6 +29,7 @@ if [[ -n "${UD_SA_KEY_FILE}" ]]; then
   ud::bazel_run //google/cloud/universe_domain/demo:kms_demo \
     "${UD_PROJECT}" "${UD_REGION}" "${UD_SA_KEY_FILE}"
   ud::bazel_test //google/cloud/storage/tests:universe_domain_integration_test
+  ud::bazel_test //google/cloud/universe_domain/integration_tests:impersonation_tests
 else
   source module ci/etc/integration-tests-config.sh
   bazel run -- //google/cloud/universe_domain/demo:kms_demo \
diff --git a/ci/cloudbuild/cloudbuild.yaml b/ci/cloudbuild/cloudbuild.yaml
index 00c9acf5c90d3..db20831188f05 100644
--- a/ci/cloudbuild/cloudbuild.yaml
+++ b/ci/cloudbuild/cloudbuild.yaml
@@ -70,11 +70,14 @@ availableSecrets:
     env: 'UD_PROJECT'
   - versionName: 'projects/${PROJECT_ID}/secrets/UD_REGION/versions/latest'
     env: 'UD_REGION'
+  - versionName: 'projects/${PROJECT_ID}/secrets/UD_ZONE/versions/latest'
+    env: 'UD_ZONE'
   - versionName: 'projects/${PROJECT_ID}/secrets/UD_SERVICE_ACCOUNT/versions/latest'
     env: 'UD_SERVICE_ACCOUNT'
   - versionName: 'projects/${PROJECT_ID}/secrets/UD_SERVICE_ACCOUNT_NAME/versions/latest'
     env: 'UD_SERVICE_ACCOUNT_NAME'
-
+  - versionName: 'projects/${PROJECT_ID}/secrets/UD_IMPERSONATED_SERVICE_ACCOUNT_NAME/versions/latest'
+    env: 'UD_IMPERSONATED_SERVICE_ACCOUNT_NAME'
 
 logsBucket: 'gs://${_LOGS_BUCKET}/logs/google-cloud-cpp/${_TRIGGER_SOURCE}/${COMMIT_SHA}/${_DISTRO}-${_BUILD_NAME}-${_SHARD}'
 
@@ -112,7 +115,7 @@ steps:
 - name: '${_POOL_REGION}-docker.pkg.dev/${PROJECT_ID}/gcb/${_IMAGE}:${BUILD_ID}'
   entrypoint: 'ci/cloudbuild/build.sh'
   args: [ '--local', '--build', '${_BUILD_NAME}' ]
-  secretEnv: ['CODECOV_TOKEN', 'UD', 'UD_PROJECT', 'UD_REGION', 'UD_SERVICE_ACCOUNT', 'UD_SERVICE_ACCOUNT_NAME']
+  secretEnv: ['CODECOV_TOKEN', 'UD', 'UD_PROJECT', 'UD_REGION', 'UD_ZONE', 'UD_SERVICE_ACCOUNT', 'UD_SERVICE_ACCOUNT_NAME', 'UD_IMPERSONATED_SERVICE_ACCOUNT_NAME']
   env: [
     'BAZEL_REMOTE_CACHE=https://storage.googleapis.com/${_CACHE_BUCKET}/bazel-cache/${_DISTRO}-${_BUILD_NAME}',
     'LIBRARIES=${_LIBRARIES}',
diff --git a/google/cloud/universe_domain/integration_tests/BUILD.bazel b/google/cloud/universe_domain/integration_tests/BUILD.bazel
new file mode 100644
index 0000000000000..e9fb8da24356e
--- /dev/null
+++ b/google/cloud/universe_domain/integration_tests/BUILD.bazel
@@ -0,0 +1,35 @@
+# Copyright 2024 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
+#
+#     https://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.
+
+package(default_visibility = ["//visibility:private"])
+
+licenses(["notice"])  # Apache 2.0
+
+cc_test(
+    name = "impersonation_tests",
+    timeout = "long",
+    srcs = ["impersonation_tests.cc"],
+    tags = [
+        "integration-test",
+        "ud-only",
+    ],
+    deps = [
+        "//:common",
+        "//:experimental-universe_domain",
+        "//google/cloud/testing_util:google_cloud_cpp_testing_private",
+        "@com_google_googletest//:gtest_main",
+        "@google_cloud_cpp//:compute",
+        "@google_cloud_cpp//:kms",
+    ],
+)
diff --git a/google/cloud/universe_domain/integration_tests/impersonation_tests.cc b/google/cloud/universe_domain/integration_tests/impersonation_tests.cc
new file mode 100644
index 0000000000000..de766e76e59a6
--- /dev/null
+++ b/google/cloud/universe_domain/integration_tests/impersonation_tests.cc
@@ -0,0 +1,112 @@
+// Copyright 2024 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
+//
+// https://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.
+
+#include "google/cloud/compute/disks/v1/disks_client.h"
+#include "google/cloud/compute/disks/v1/disks_options.h"
+#include "google/cloud/kms/v1/key_management_client.h"
+#include "google/cloud/kms/v1/key_management_options.h"
+#include "google/cloud/internal/getenv.h"
+#include "google/cloud/internal/rest_options.h"
+#include "google/cloud/location.h"
+#include "google/cloud/testing_util/integration_test.h"
+#include "google/cloud/testing_util/status_matchers.h"
+#include "google/cloud/universe_domain.h"
+#include "google/cloud/universe_domain_options.h"
+#include <gmock/gmock.h>
+#include <fstream>
+
+namespace google {
+namespace cloud {
+namespace universe_domain {
+GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
+namespace {
+
+namespace gc = ::google::cloud;
+using ::google::cloud::testing_util::StatusIs;
+
+class DomainUniverseImpersonationTest
+    : public ::google::cloud::testing_util::IntegrationTest {
+ protected:
+  void SetUp() override {
+    project_id_ = gc::internal::GetEnv("UD_PROJECT").value_or("");
+    ASSERT_FALSE(project_id_.empty());
+    zone_id_ = gc::internal::GetEnv("UD_ZONE").value_or("");
+    ASSERT_FALSE(zone_id_.empty());
+    region_id_ = gc::internal::GetEnv("UD_REGION").value_or("");
+    ASSERT_FALSE(region_id_.empty());
+    impersonated_sa_ =
+        gc::internal::GetEnv("UD_IMPERSONATED_SERVICE_ACCOUNT_NAME")
+            .value_or("");
+    ASSERT_FALSE(impersonated_sa_.empty());
+    std::string const sa_key_file =
+        gc::internal::GetEnv("UD_SA_KEY_FILE").value_or("");
+    ASSERT_FALSE(sa_key_file.empty());
+
+    auto is = std::ifstream(sa_key_file);
+    is.exceptions(std::ios::badbit);
+    credential_ = std::string(std::istreambuf_iterator<char>(is.rdbuf()), {});
+  }
+
+  std::string project_id_;
+  std::string zone_id_;
+  std::string region_id_;
+  std::string impersonated_sa_;
+  std::string credential_;
+};
+
+TEST_F(DomainUniverseImpersonationTest, SAToSAImpersonationRest) {
+  namespace disks = ::google::cloud::compute_disks_v1;
+
+  gc::Options options;
+  options.set<google::cloud::UnifiedCredentialsOption>(
+      google::cloud::MakeImpersonateServiceAccountCredentials(
+          google::cloud::MakeServiceAccountCredentials(credential_),
+          impersonated_sa_));
+
+  auto ud_options = gc::AddUniverseDomainOption(gc::ExperimentalTag{}, options);
+  ASSERT_STATUS_OK(ud_options);
+
+  auto client = disks::DisksClient(disks::MakeDisksConnectionRest(*ud_options));
+
+  for (auto disk : client.ListDisks(project_id_, zone_id_)) {
+    EXPECT_STATUS_OK(disk);
+  }
+}
+
+TEST_F(DomainUniverseImpersonationTest, SAToSAImpersonationGrpc) {
+  namespace kms = ::google::cloud::kms_v1;
+
+  auto const location = gc::Location(project_id_, region_id_);
+  gc::Options options;
+  options.set<google::cloud::UnifiedCredentialsOption>(
+      google::cloud::MakeImpersonateServiceAccountCredentials(
+          google::cloud::MakeServiceAccountCredentials(credential_),
+          impersonated_sa_));
+
+  auto ud_options = gc::AddUniverseDomainOption(gc::ExperimentalTag{}, options);
+  ASSERT_STATUS_OK(ud_options);
+
+  auto client = kms::KeyManagementServiceClient(
+      kms::MakeKeyManagementServiceConnection(*ud_options));
+
+  for (auto kr : client.ListKeyRings(location.FullName())) {
+    EXPECT_STATUS_OK(kr);
+  }
+}
+
+}  // namespace
+GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
+}  // namespace universe_domain
+}  // namespace cloud
+}  // namespace google