diff --git a/README.md b/README.md
index a37e1bf..fe63544 100644
--- a/README.md
+++ b/README.md
@@ -130,3 +130,4 @@ Create resources w/o prompting
 4. Run `make generate`
 5. Run `make manifests`
 
+6. Adapt reconciler in `internal/controller` -> `tdset_controller.go`
\ No newline at end of file
diff --git a/internal/controller/tdset_controller.go b/internal/controller/tdset_controller.go
index bee06dd..5512dea 100644
--- a/internal/controller/tdset_controller.go
+++ b/internal/controller/tdset_controller.go
@@ -18,6 +18,7 @@ package controller
 
 import (
 	"context"
+	"time"
 
 	"k8s.io/apimachinery/pkg/runtime"
 	ctrl "sigs.k8s.io/controller-runtime"
@@ -27,6 +28,10 @@ import (
 	schedulev1 "github.com/baschno/tdset-operator/api/v1"
 )
 
+const (
+	DefaultReconciliationInterval = 5
+)
+
 // TDSetReconciler reconciles a TDSet object
 type TDSetReconciler struct {
 	client.Client
@@ -47,11 +52,65 @@ type TDSetReconciler struct {
 // For more details, check Reconcile and its Result here:
 // - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.19.0/pkg/reconcile
 func (r *TDSetReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
-	_ = log.FromContext(ctx)
-
 	// TODO(user): your logic here
+	log := log.FromContext(ctx)
 
-	return ctrl.Result{}, nil
+	log.Info("starting reconciliation")
+
+	tdSet := &schedulev1.TDSet{}
+
+	// Get the TDSet
+	err := r.GetTDSet(ctx, req, tdSet)
+	if err != nil {
+		if apierrors.IsNotFound(err) {
+			log.Info("TDSet resource not found. Ignoring since object must be deleted")
+
+			return ctrl.Result{}, nil
+		}
+
+		log.Error(err, "Failed to get TDSet")
+
+		return ctrl.Result{}, err
+	}
+
+	// Try to set initial condition status
+	err = r.SetInitialCondition(ctx, req, tdSet)
+	if err != nil {
+		log.Error(err, "failed to set initial condition")
+
+		return ctrl.Result{}, err
+	}
+
+	// TODO: Delete finalizer
+
+	// Deployment if not exist
+	ok, err := r.DeploymentIfNotExist(ctx, req, tdSet)
+	if err != nil {
+		log.Error(err, "failed to deploy deployment for TDSet")
+
+		return ctrl.Result{}, err
+	}
+
+	if ok {
+		return ctrl.Result{RequeueAfter: time.Minute}, nil
+	}
+
+	// Update deployment replica if mis matched.
+	err = r.UpdateDeploymentReplica(ctx, req, tdSet)
+	if err != nil {
+		log.Error(err, "failed to update deployment for TDSet")
+
+		return ctrl.Result{}, err
+	}
+
+	interval := DefaultReconciliationInterval
+	if tdSet.Spec.IntervalMint != 0 {
+		interval = int(tdSet.Spec.IntervalMint)
+	}
+
+	log.Info("ending reconciliation")
+
+	return ctrl.Result{RequeueAfter: time.Duration(time.Minute * time.Duration(interval))}, nil
 }
 
 // SetupWithManager sets up the controller with the Manager.