diff --git a/gcp-observability/src/main/java/io/grpc/gcp/observability/GcpObservability.java b/gcp-observability/src/main/java/io/grpc/gcp/observability/GcpObservability.java
index 1eb243a7940..d5a608d83b0 100644
--- a/gcp-observability/src/main/java/io/grpc/gcp/observability/GcpObservability.java
+++ b/gcp-observability/src/main/java/io/grpc/gcp/observability/GcpObservability.java
@@ -39,12 +39,17 @@
 import io.opencensus.exporter.stats.stackdriver.StackdriverStatsExporter;
 import io.opencensus.exporter.trace.stackdriver.StackdriverTraceConfiguration;
 import io.opencensus.exporter.trace.stackdriver.StackdriverTraceExporter;
+import io.opencensus.metrics.LabelKey;
+import io.opencensus.metrics.LabelValue;
+import io.opencensus.trace.AttributeValue;
 import io.opencensus.trace.Tracing;
 import io.opencensus.trace.config.TraceConfig;
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Map;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import java.util.stream.Collectors;
 
 /** The main class for gRPC Google Cloud Platform Observability features. */
 @ExperimentalApi("https://github.com/grpc/grpc-java/issues/8869")
@@ -78,7 +83,8 @@ public static synchronized GcpObservability grpcInit() throws IOException {
       instance = grpcInit(sink, observabilityConfig,
           new InternalLoggingChannelInterceptor.FactoryImpl(helper, configFilterHelper),
           new InternalLoggingServerInterceptor.FactoryImpl(helper, configFilterHelper));
-      instance.registerStackDriverExporter(observabilityConfig.getDestinationProjectId());
+      instance.registerStackDriverExporter(observabilityConfig.getDestinationProjectId(),
+          observabilityConfig.getCustomTags());
     }
     return instance;
   }
@@ -139,7 +145,8 @@ private void setProducer(
         clientInterceptors, serverInterceptors, tracerFactories);
   }
 
-  private void registerStackDriverExporter(String projectId) throws IOException {
+  private void registerStackDriverExporter(String projectId, Map<String, String> customTags)
+      throws IOException {
     if (config.isEnableCloudMonitoring()) {
       RpcViews.registerAllGrpcViews();
       StackdriverStatsConfiguration.Builder statsConfigurationBuilder =
@@ -147,6 +154,12 @@ private void registerStackDriverExporter(String projectId) throws IOException {
       if (projectId != null) {
         statsConfigurationBuilder.setProjectId(projectId);
       }
+      if (customTags != null) {
+        Map<LabelKey, LabelValue> constantLabels = customTags.entrySet().stream()
+            .collect(Collectors.toMap(e -> LabelKey.create(e.getKey(), e.getKey()),
+                e -> LabelValue.create(e.getValue())));
+        statsConfigurationBuilder.setConstantLabels(constantLabels);
+      }
       StackdriverStatsExporter.createAndRegister(statsConfigurationBuilder.build());
       metricsEnabled = true;
     }
@@ -160,6 +173,12 @@ private void registerStackDriverExporter(String projectId) throws IOException {
       if (projectId != null) {
         traceConfigurationBuilder.setProjectId(projectId);
       }
+      if (customTags != null) {
+        Map<String, AttributeValue> fixedAttributes = customTags.entrySet().stream()
+            .collect(Collectors.toMap(e -> e.getKey(),
+                e -> AttributeValue.stringAttributeValue(e.getValue())));
+        traceConfigurationBuilder.setFixedAttributes(fixedAttributes);
+      }
       StackdriverTraceExporter.createAndRegister(traceConfigurationBuilder.build());
       tracesEnabled = true;
     }