diff --git a/src/WebJobs.Script/Diagnostics/OpenTelemetry/FunctionsResourceDetector.cs b/src/WebJobs.Script/Diagnostics/OpenTelemetry/FunctionsResourceDetector.cs
index 958afe525f..8bd07d26f0 100644
--- a/src/WebJobs.Script/Diagnostics/OpenTelemetry/FunctionsResourceDetector.cs
+++ b/src/WebJobs.Script/Diagnostics/OpenTelemetry/FunctionsResourceDetector.cs
@@ -10,22 +10,31 @@ namespace Microsoft.Azure.WebJobs.Script.Diagnostics.OpenTelemetry
 {
     internal sealed class FunctionsResourceDetector : IResourceDetector
     {
+        private static readonly string _assemblyVersion = typeof(ScriptHost).Assembly.GetName().Version.ToString();
+        private static readonly int _processId = Process.GetCurrentProcess().Id;
+
         public Resource Detect()
         {
             List<KeyValuePair<string, object>> attributeList = new(9);
             try
             {
-                string serviceName = Environment.GetEnvironmentVariable(EnvironmentSettingNames.AzureWebsiteName);
-                string version = typeof(ScriptHost).Assembly.GetName().Version.ToString();
+                // Determine service name with override hierarchy: OTEL_SERVICE_NAME > AzureWebsiteName > AssemblyName
+                string serviceName = GetServiceName();
+
+                // Determine service version with override hierarchy: OTEL_SERVICE_VERSION > AssemblyVersion
+                string serviceVersion = GetServiceVersion();
 
-                attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.ServiceVersion, version));
-                attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.AISDKPrefix, $@"{OpenTelemetryConstants.SDKPrefix}:{version}"));
-                attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.ProcessId, Process.GetCurrentProcess().Id));
+                // Add version and SDK prefix attributes
+                attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.ServiceVersion, serviceVersion));
+                attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.AISDKPrefix, $"{OpenTelemetryConstants.SDKPrefix}:{serviceVersion}"));
+                attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.ProcessId, _processId));
+                attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.ServiceName, serviceName));
 
-                // Add these attributes only if running in Azure.
-                if (!string.IsNullOrEmpty(serviceName))
+                // Only add Azure-specific attributes if WEBSITE_SITE_NAME is defined
+                string azureWebsiteName = Environment.GetEnvironmentVariable(EnvironmentSettingNames.AzureWebsiteName);
+
+                if (!string.IsNullOrEmpty(azureWebsiteName))
                 {
-                    attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.ServiceName, serviceName));
                     attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.CloudProvider, OpenTelemetryConstants.AzureCloudProviderValue));
                     attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.CloudPlatform, OpenTelemetryConstants.AzurePlatformValue));
 
@@ -35,7 +44,7 @@ public Resource Detect()
                         attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.CloudRegion, region));
                     }
 
-                    var azureResourceUri = GetAzureResourceURI(serviceName);
+                    var azureResourceUri = GetAzureResourceURI(azureWebsiteName);
                     if (azureResourceUri != null)
                     {
                         attributeList.Add(new KeyValuePair<string, object>(ResourceSemanticConventions.CloudResourceId, azureResourceUri));
@@ -71,5 +80,31 @@ private static string GetAzureResourceURI(string websiteSiteName)
 
             return $"/subscriptions/{subscriptionId}/resourceGroups/{websiteResourceGroup}/providers/Microsoft.Web/sites/{websiteSiteName}";
         }
+
+        private static string GetServiceName()
+        {
+            // Priority: OTEL_SERVICE_NAME > AzureWebsiteName > AssemblyName
+            string serviceName = Environment.GetEnvironmentVariable(ResourceSemanticConventions.ServiceNameEnvVar);
+            if (!string.IsNullOrEmpty(serviceName))
+            {
+                return serviceName;
+            }
+
+            serviceName = Environment.GetEnvironmentVariable(EnvironmentSettingNames.AzureWebsiteName);
+            if (!string.IsNullOrEmpty(serviceName))
+            {
+                return serviceName;
+            }
+
+            // Fallback to assembly name
+            return typeof(ScriptHost).Assembly.GetName().Name;
+        }
+
+        private static string GetServiceVersion()
+        {
+            // Priority: OTEL_SERVICE_VERSION > AssemblyVersion
+            string version = Environment.GetEnvironmentVariable(ResourceSemanticConventions.ServiceVersionEnvVar);
+            return !string.IsNullOrEmpty(version) ? version : _assemblyVersion;
+        }
     }
 }
diff --git a/src/WebJobs.Script/Diagnostics/OpenTelemetry/ResourceSemanticConventions.cs b/src/WebJobs.Script/Diagnostics/OpenTelemetry/ResourceSemanticConventions.cs
index c6c7eca606..d6ada0de9c 100644
--- a/src/WebJobs.Script/Diagnostics/OpenTelemetry/ResourceSemanticConventions.cs
+++ b/src/WebJobs.Script/Diagnostics/OpenTelemetry/ResourceSemanticConventions.cs
@@ -9,6 +9,8 @@ internal static class ResourceSemanticConventions
         internal const string ServiceName = "service.name";
         internal const string ServiceVersion = "service.version";
         internal const string ServiceInstanceId = "service.instance.id";
+        internal const string ServiceNameEnvVar = "OTEL_SERVICE_NAME";
+        internal const string ServiceVersionEnvVar = "OTEL_SERVICE_VERSION";
 
         // Cloud
         internal const string CloudProvider = "cloud.provider";