diff --git a/internal/webhook/appwrapper_webhook.go b/internal/webhook/appwrapper_webhook.go
index 402c029..3967a16 100644
--- a/internal/webhook/appwrapper_webhook.go
+++ b/internal/webhook/appwrapper_webhook.go
@@ -30,6 +30,7 @@ import (
 	discovery "k8s.io/client-go/discovery"
 	"k8s.io/client-go/kubernetes"
 	authClientv1 "k8s.io/client-go/kubernetes/typed/authorization/v1"
+	utilmaps "sigs.k8s.io/kueue/pkg/util/maps"
 
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/log"
@@ -44,6 +45,11 @@ import (
 	"github.com/project-codeflare/appwrapper/pkg/utils"
 )
 
+const (
+	AppWrapperUsernameLabel = "workload.codeflare.dev/user"
+	AppWrapperUserIDLabel   = "workload.codeflare.dev/userid"
+)
+
 type AppWrapperWebhook struct {
 	Config                *config.AppWrapperConfig
 	SubjectAccessReviewer authClientv1.SubjectAccessReviewInterface
@@ -66,6 +72,14 @@ func (w *AppWrapperWebhook) Default(ctx context.Context, obj runtime.Object) err
 		log.FromContext(ctx).Info("Error raised during podSet inference", "job", aw)
 		return err
 	}
+
+	// inject labels with user name and id
+	request, err := admission.RequestFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	userInfo := request.UserInfo
+	aw.Labels = utilmaps.MergeKeepFirst(map[string]string{AppWrapperUsernameLabel: userInfo.Username, AppWrapperUserIDLabel: userInfo.UID}, aw.Labels)
 	return nil
 }
 
@@ -258,6 +272,14 @@ func (w *AppWrapperWebhook) validateAppWrapperUpdate(old *workloadv1beta2.AppWra
 		}
 	}
 
+	// ensure user name and id are not mutated
+	if old.Labels[AppWrapperUsernameLabel] != new.Labels[AppWrapperUsernameLabel] {
+		allErrors = append(allErrors, field.Forbidden(field.NewPath("metadata").Child("labels").Key(AppWrapperUsernameLabel), msg))
+	}
+	if old.Labels[AppWrapperUserIDLabel] != new.Labels[AppWrapperUserIDLabel] {
+		allErrors = append(allErrors, field.Forbidden(field.NewPath("metadata").Child("labels").Key(AppWrapperUserIDLabel), msg))
+	}
+
 	return allErrors
 }
 
diff --git a/internal/webhook/appwrapper_webhook_test.go b/internal/webhook/appwrapper_webhook_test.go
index abfb109..aeca492 100644
--- a/internal/webhook/appwrapper_webhook_test.go
+++ b/internal/webhook/appwrapper_webhook_test.go
@@ -27,6 +27,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/utils/ptr"
+	utilmaps "sigs.k8s.io/kueue/pkg/util/maps"
 )
 
 var _ = Describe("AppWrapper Webhook Tests", func() {
@@ -39,6 +40,16 @@ var _ = Describe("AppWrapper Webhook Tests", func() {
 			Expect(aw.Spec.Suspend).Should(BeTrue(), "aw.Spec.Suspend should have been changed to true")
 			Expect(k8sClient.Delete(ctx, aw)).To(Succeed())
 		})
+
+		It("User name and ID are set", func() {
+			aw := toAppWrapper(pod(100))
+			aw.Labels = utilmaps.MergeKeepFirst(map[string]string{AppWrapperUsernameLabel: "bad", AppWrapperUserIDLabel: "bad"}, aw.Labels)
+
+			Expect(k8sLimitedClient.Create(ctx, aw)).To(Succeed())
+			Expect(aw.Labels[AppWrapperUsernameLabel]).Should(BeIdenticalTo(limitedUserName))
+			Expect(aw.Labels[AppWrapperUserIDLabel]).Should(BeIdenticalTo(limitedUserID))
+			Expect(k8sLimitedClient.Delete(ctx, aw)).To(Succeed())
+		})
 	})
 
 	Context("Validating Webhook", func() {
@@ -128,6 +139,36 @@ var _ = Describe("AppWrapper Webhook Tests", func() {
 			Expect(k8sClient.Create(ctx, aw)).ShouldNot(Succeed())
 		})
 
+		It("User name and ID are immutable", func() {
+			aw := toAppWrapper(pod(100))
+			awName := types.NamespacedName{Name: aw.Name, Namespace: aw.Namespace}
+			Expect(k8sClient.Create(ctx, aw)).Should(Succeed())
+
+			aw = getAppWrapper(awName)
+			aw.Labels[AppWrapperUsernameLabel] = "bad"
+			Expect(k8sClient.Update(ctx, aw)).ShouldNot(Succeed())
+
+			aw = getAppWrapper(awName)
+			aw.Labels[AppWrapperUserIDLabel] = "bad"
+			Expect(k8sClient.Update(ctx, aw)).ShouldNot(Succeed())
+
+			Expect(k8sClient.Delete(ctx, aw)).To(Succeed())
+		})
+
+		It("User name and ID should be preserved on updates", func() {
+			aw := toAppWrapper(pod(100))
+			awName := types.NamespacedName{Name: aw.Name, Namespace: aw.Namespace}
+			Expect(k8sLimitedClient.Create(ctx, aw)).Should(Succeed())
+
+			aw = getAppWrapper(awName)
+			Expect(k8sClient.Update(ctx, aw)).Should(Succeed())
+
+			aw = getAppWrapper(awName)
+			Expect(aw.Labels[AppWrapperUsernameLabel]).Should(BeIdenticalTo(limitedUserName))
+			Expect(aw.Labels[AppWrapperUserIDLabel]).Should(BeIdenticalTo(limitedUserID))
+			Expect(k8sLimitedClient.Delete(ctx, aw)).To(Succeed())
+		})
+
 		Context("aw.Spec.Components is immutable", func() {
 			It("Updates to non-sensitive fields are allowed", func() {
 				aw := toAppWrapper(pod(100), deployment(4, 100))
diff --git a/internal/webhook/suite_test.go b/internal/webhook/suite_test.go
index 04cc4e3..94763ae 100644
--- a/internal/webhook/suite_test.go
+++ b/internal/webhook/suite_test.go
@@ -60,6 +60,9 @@ var testEnv *envtest.Environment
 var ctx context.Context
 var cancel context.CancelFunc
 
+const limitedUserName = "limited-user"
+const limitedUserID = "8da0fcfe-6d7f-4f44-b433-d91d22cc1b8c"
+
 func TestControllers(t *testing.T) {
 	RegisterFailHandler(Fail)
 
@@ -115,9 +118,8 @@ var _ = BeforeSuite(func() {
 	Expect(k8sClient).NotTo(BeNil())
 
 	// configure a restricted rbac user who can create AppWrappers and Pods but not Deployments
-	limitedUserName := "limited-user"
 	limitedCfg := *cfg
-	limitedCfg.Impersonate = rest.ImpersonationConfig{UserName: limitedUserName, Extra: map[string][]string{"xyzzy": {"plugh"}}}
+	limitedCfg.Impersonate = rest.ImpersonationConfig{UserName: limitedUserName, UID: string(limitedUserID), Extra: map[string][]string{"xyzzy": {"plugh"}}}
 	_, err = testEnv.AddUser(envtest.User{Name: limitedUserName, Groups: []string{}}, &limitedCfg)
 	Expect(err).NotTo(HaveOccurred())
 	clusterRole := &rbacv1.ClusterRole{