diff --git a/src/main/java/de/hitec/nhplus/main/MainWindowController.java b/src/main/java/de/hitec/nhplus/main/MainWindowController.java
index aa00e93..5f23f03 100644
--- a/src/main/java/de/hitec/nhplus/main/MainWindowController.java
+++ b/src/main/java/de/hitec/nhplus/main/MainWindowController.java
@@ -20,12 +20,24 @@ import java.util.List;
  * @author Dorian Nemec
  */
 public class MainWindowController {
+    private static MainWindowController instace;
     @FXML
     public TabPane mainTabPane;
-
     private User user;
     private TabManager tabManager;
 
+    public MainWindowController() {
+        instace = this;
+    }
+
+    public static MainWindowController getInstance() {
+        return instace;
+    }
+
+    public User getUser() {
+        return user;
+    }
+
     /**
      * JavaFX Initialization method that is called after the binding of all the fields.
      *
@@ -33,6 +45,7 @@ public class MainWindowController {
      */
     @FXML
     public void initialize(User user) {
+        instace = this;
         this.user = user;
         this.tabManager = new TabManager(user);
         setupTabs();
@@ -63,7 +76,7 @@ public class MainWindowController {
                 new TabStruct(
                         "Pfleger",
                         "/de/hitec/nhplus/nurse/AllNurseView.fxml",
-                        Permissions.NURSE | Permissions.MANAGEMENT
+                        Permissions.NURSE | Permissions.MANAGEMENT | Permissions.OWNER
                 ),
                 new TabStruct(
                         "Gesperrte Pfleger",
diff --git a/src/main/java/de/hitec/nhplus/nurse/AllNurseController.java b/src/main/java/de/hitec/nhplus/nurse/AllNurseController.java
index 6f72582..cf9dfa2 100644
--- a/src/main/java/de/hitec/nhplus/nurse/AllNurseController.java
+++ b/src/main/java/de/hitec/nhplus/nurse/AllNurseController.java
@@ -1,8 +1,8 @@
 package de.hitec.nhplus.nurse;
 
-import static de.hitec.nhplus.utils.Validator.*;
-
 import de.hitec.nhplus.datastorage.DaoFactory;
+import de.hitec.nhplus.login.Permissions;
+import de.hitec.nhplus.main.MainWindowController;
 import de.hitec.nhplus.nurse.database.NurseDao;
 import javafx.beans.value.ChangeListener;
 import javafx.collections.FXCollections;
@@ -17,6 +17,8 @@ import javafx.scene.control.cell.TextFieldTableCell;
 
 import java.sql.SQLException;
 
+import static de.hitec.nhplus.utils.Validator.*;
+
 /**
  * The controller for viewing all {@link Nurse}s.
  *
@@ -49,12 +51,17 @@ public class AllNurseController {
 
     private final ObservableList<Nurse> nurses = FXCollections.observableArrayList();
     private NurseDao dao;
+    private boolean hasEditPermissions;
 
     /**
      * Initialization method that is called after the binding of all the fields.
      */
     @FXML
     public void initialize() {
+        int editPermissions = Permissions.MANAGEMENT | Permissions.OWNER;
+        int userPermissions = MainWindowController.getInstance().getUser().getPermissions();
+        hasEditPermissions = (userPermissions & editPermissions) != 0;
+
         this.readAllAndShowInTableView();
 
         this.columnId.setCellValueFactory(new PropertyValueFactory<>("id"));
@@ -71,12 +78,18 @@ public class AllNurseController {
 
         this.tableView.setItems(this.nurses);
 
+
         this.buttonAdd.setDisable(true);
-        ChangeListener<String> inputNewNurseValidationListener = (observableValue, oldText, newText)->
+        if (!hasEditPermissions) {
+            this.buttonLock.setDisable(true);
+            return;
+        }
+
+        ChangeListener<String> inputNewNurseValidationListener = (observableValue, oldText, newText) ->
         {
             boolean isValid = isValidFirstName(this.textFieldFirstName.getText())
-                && isValidSurName(this.textFieldSurName.getText())
-                && isValidPhoneNumber(this.textFieldPhoneNumber.getText());
+                              && isValidSurName(this.textFieldSurName.getText())
+                              && isValidPhoneNumber(this.textFieldPhoneNumber.getText());
 
             AllNurseController.this.buttonAdd.setDisable(!isValid);
         };
@@ -89,12 +102,12 @@ public class AllNurseController {
     /**
      * Internal method to read all data and set it to the table view.
      */
-    private void readAllAndShowInTableView(){
+    private void readAllAndShowInTableView() {
         this.nurses.clear();
         this.dao = DaoFactory.getInstance().createNurseDAO();
         try {
             this.nurses.setAll(this.dao.readAllActive());
-        }catch (SQLException exception){
+        } catch (SQLException exception) {
             exception.printStackTrace();
         }
     }
@@ -120,14 +133,13 @@ public class AllNurseController {
     }
 
     @FXML
-    public void handleAdd(){
-        String surname=this.textFieldSurName.getText();
-        String firstName=this.textFieldFirstName.getText();
-        String phoneNumber=this.textFieldPhoneNumber.getText();
+    public void handleAdd() {
+        String surname = this.textFieldSurName.getText();
+        String firstName = this.textFieldFirstName.getText();
+        String phoneNumber = this.textFieldPhoneNumber.getText();
         try {
             this.dao.create(new Nurse(firstName, surname, phoneNumber));
-        }
-        catch (SQLException exception){
+        } catch (SQLException exception) {
             exception.printStackTrace();
         }
         readAllAndShowInTableView();
@@ -135,16 +147,16 @@ public class AllNurseController {
     }
 
     @FXML
-    public void handleLock(){
+    public void handleLock() {
         Nurse selectedItem = this.tableView.getSelectionModel().getSelectedItem();
-        if (selectedItem == null){
+        if (selectedItem == null) {
             return;
         }
 
         try {
             selectedItem.setLocked(true);
             this.dao.update(selectedItem);
-        }catch (SQLException exception){
+        } catch (SQLException exception) {
             exception.printStackTrace();
         }
         readAllAndShowInTableView();
@@ -152,6 +164,10 @@ public class AllNurseController {
 
     @FXML
     public void handleOnEditSurname(TableColumn.CellEditEvent<Nurse, String> event) {
+        if(!hasEditPermissions){
+            event.getTableView().refresh();
+            return;
+        }
         String newSurName = event.getNewValue();
         if (!isValidSurName(newSurName)) {
             showValidationError("Nachname");
@@ -164,6 +180,10 @@ public class AllNurseController {
 
     @FXML
     public void handleOnEditFirstname(TableColumn.CellEditEvent<Nurse, String> event) {
+        if(!hasEditPermissions){
+            event.getTableView().refresh();
+            return;
+        }
         String newFirstName = event.getNewValue();
         if (!isValidFirstName(newFirstName)) {
             showValidationError("Vorname");
@@ -176,6 +196,10 @@ public class AllNurseController {
 
     @FXML
     public void handleOnEditPhoneNumber(TableColumn.CellEditEvent<Nurse, String> event) {
+        if(!hasEditPermissions){
+            event.getTableView().refresh();
+            return;
+        }
         String newPhoneNumber = event.getNewValue();
         if (!isValidPhoneNumber(newPhoneNumber)) {
             showValidationError("Telefonnummer");