diff --git a/apis/ecs/generator-config.yaml b/apis/ecs/generator-config.yaml
index 5d86b39587..6d627255c0 100644
--- a/apis/ecs/generator-config.yaml
+++ b/apis/ecs/generator-config.yaml
@@ -18,6 +18,14 @@ ignore:
   resource_names:
   - CapacityProvider
   - TaskSet
+resources:
+  Service:
+    fields:
+      TaskArns:
+        is_read_only: true
+        from:
+          operation: ListTasks
+          path: TaskArns
 operations:
   DeregisterTaskDefinition:
     operation_type:
diff --git a/apis/ecs/v1alpha1/zz_generated.deepcopy.go b/apis/ecs/v1alpha1/zz_generated.deepcopy.go
index d8363d9149..289b53c154 100644
--- a/apis/ecs/v1alpha1/zz_generated.deepcopy.go
+++ b/apis/ecs/v1alpha1/zz_generated.deepcopy.go
@@ -3592,6 +3592,17 @@ func (in *ServiceObservation) DeepCopyInto(out *ServiceObservation) {
 		*out = new(string)
 		**out = **in
 	}
+	if in.TaskARNs != nil {
+		in, out := &in.TaskARNs, &out.TaskARNs
+		*out = make([]*string, len(*in))
+		for i := range *in {
+			if (*in)[i] != nil {
+				in, out := &(*in)[i], &(*out)[i]
+				*out = new(string)
+				**out = **in
+			}
+		}
+	}
 	if in.TaskDefinition != nil {
 		in, out := &in.TaskDefinition, &out.TaskDefinition
 		*out = new(string)
diff --git a/apis/ecs/v1alpha1/zz_service.go b/apis/ecs/v1alpha1/zz_service.go
index aa13c36b42..440bd8cb8b 100644
--- a/apis/ecs/v1alpha1/zz_service.go
+++ b/apis/ecs/v1alpha1/zz_service.go
@@ -263,6 +263,8 @@ type ServiceObservation struct {
 	ServiceName *string `json:"serviceName,omitempty"`
 	// The status of the service. The valid values are ACTIVE, DRAINING, or INACTIVE.
 	Status *string `json:"status,omitempty"`
+	// The list of task ARN entries for the ListTasks request.
+	TaskARNs []*string `json:"taskARNs,omitempty"`
 	// The task definition to use for tasks in the service. This value is specified
 	// when the service is created with CreateService, and it can be modified with
 	// UpdateService.
diff --git a/package/crds/ecs.aws.crossplane.io_services.yaml b/package/crds/ecs.aws.crossplane.io_services.yaml
index fce0c29c7b..56d340c036 100644
--- a/package/crds/ecs.aws.crossplane.io_services.yaml
+++ b/package/crds/ecs.aws.crossplane.io_services.yaml
@@ -1586,6 +1586,11 @@ spec:
                     description: The status of the service. The valid values are ACTIVE,
                       DRAINING, or INACTIVE.
                     type: string
+                  taskARNs:
+                    description: The list of task ARN entries for the ListTasks request.
+                    items:
+                      type: string
+                    type: array
                   taskDefinition:
                     description: |-
                       The task definition to use for tasks in the service. This value is specified
diff --git a/pkg/controller/ecs/service/setup.go b/pkg/controller/ecs/service/setup.go
index b8f0524bf4..9a687de6ae 100644
--- a/pkg/controller/ecs/service/setup.go
+++ b/pkg/controller/ecs/service/setup.go
@@ -5,6 +5,7 @@ import (
 
 	"github.com/aws/aws-sdk-go/aws"
 	svcsdk "github.com/aws/aws-sdk-go/service/ecs"
+	svcsdkapi "github.com/aws/aws-sdk-go/service/ecs/ecsiface"
 	xpv1 "github.com/crossplane/crossplane-runtime/apis/common/v1"
 	"github.com/crossplane/crossplane-runtime/pkg/connection"
 	"github.com/crossplane/crossplane-runtime/pkg/controller"
@@ -14,8 +15,10 @@ import (
 	"github.com/crossplane/crossplane-runtime/pkg/resource"
 	"github.com/google/go-cmp/cmp"
 	"github.com/google/go-cmp/cmp/cmpopts"
+	"github.com/pkg/errors"
 	"k8s.io/utils/ptr"
 	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
 
 	svcapitypes "github.com/crossplane-contrib/provider-aws/apis/ecs/v1alpha1"
 	"github.com/crossplane-contrib/provider-aws/apis/v1alpha1"
@@ -23,13 +26,19 @@ import (
 	custommanaged "github.com/crossplane-contrib/provider-aws/pkg/utils/reconciler/managed"
 )
 
+type custom struct {
+	kube   client.Client
+	client svcsdkapi.ECSAPI
+}
+
 // SetupService adds a controller that reconciles Service.
 func SetupService(mgr ctrl.Manager, o controller.Options) error {
 	name := managed.ControllerName(svcapitypes.ServiceGroupKind)
 	opts := []option{
 		func(e *external) {
+			c := &custom{client: e.client, kube: e.kube}
 			e.preObserve = preObserve
-			e.postObserve = postObserve
+			e.postObserve = c.postObserve
 			e.preCreate = preCreate
 			e.preUpdate = preUpdate
 			e.preDelete = preDelete
@@ -170,7 +179,7 @@ func preObserve(_ context.Context, cr *svcapitypes.Service, obj *svcsdk.Describe
 	return nil
 }
 
-func postObserve(_ context.Context, cr *svcapitypes.Service, resp *svcsdk.DescribeServicesOutput, obs managed.ExternalObservation, err error) (managed.ExternalObservation, error) {
+func (e *custom) postObserve(_ context.Context, cr *svcapitypes.Service, resp *svcsdk.DescribeServicesOutput, obs managed.ExternalObservation, err error) (managed.ExternalObservation, error) {
 	if err != nil {
 		return obs, err
 	}
@@ -179,6 +188,15 @@ func postObserve(_ context.Context, cr *svcapitypes.Service, resp *svcsdk.Descri
 		return obs, err
 	}
 
+	listTasksOutput, err := e.client.ListTasks(&svcsdk.ListTasksInput{
+		Cluster:     cr.Spec.ForProvider.Cluster,
+		ServiceName: aws.String(meta.GetExternalName(cr)),
+	})
+	if err != nil {
+		return managed.ExternalObservation{}, errors.Wrap(err, "ListTasks failed")
+	}
+	cr.Status.AtProvider.TaskARNs = listTasksOutput.TaskArns
+
 	switch aws.StringValue(resp.Services[0].Status) {
 	case "ACTIVE":
 		if resp.Services[0].DesiredCount == nil || resp.Services[0].RunningCount == nil || *resp.Services[0].DesiredCount != *resp.Services[0].RunningCount {