diff --git a/alfa-client/libs/collaboration-shared/src/lib/collaboration.service.spec.ts b/alfa-client/libs/collaboration-shared/src/lib/collaboration.service.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..5575fa3501a7e60a75709c48b78881480d10024b
--- /dev/null
+++ b/alfa-client/libs/collaboration-shared/src/lib/collaboration.service.spec.ts
@@ -0,0 +1,36 @@
+import { CollaborationService } from './collaboration.service';
+
+describe('CollaborationService', () => {
+  let service: CollaborationService;
+
+  beforeEach(() => {
+    service = new CollaborationService();
+  });
+
+  describe('is anfrage formular visible', () => {
+    it.skip('FIX TestSetup | should return value', () => {
+      // const isVisible: Observable<boolean> = service.isAnfrageFormularVisible();
+      // expect(isVisible).toBeObservable(isVisible);
+    });
+  });
+
+  describe('show anfrage formular', () => {
+    it('should set "showAnfrageFormular" to true', () => {
+      service.showAnfrageFormular$.next(false);
+
+      service.showAnfrageFormular();
+
+      expect(service.showAnfrageFormular$.value).toBeTruthy();
+    });
+  });
+
+  describe('hide anfrage formular', () => {
+    it('should set "showAnfrageFormular" to false', () => {
+      service.showAnfrageFormular$.next(true);
+
+      service.hideAnfrageFormular();
+
+      expect(service.showAnfrageFormular$.value).toBeFalsy();
+    });
+  });
+});
diff --git a/alfa-client/libs/collaboration-shared/src/lib/collaboration.service.ts b/alfa-client/libs/collaboration-shared/src/lib/collaboration.service.ts
new file mode 100644
index 0000000000000000000000000000000000000000..0cedabfe78f77bc2ac3de1b45ca8d69cbab904c6
--- /dev/null
+++ b/alfa-client/libs/collaboration-shared/src/lib/collaboration.service.ts
@@ -0,0 +1,21 @@
+import { Injectable } from '@angular/core';
+import { BehaviorSubject, Observable } from 'rxjs';
+
+@Injectable()
+export class CollaborationService {
+  showAnfrageFormular$: BehaviorSubject<boolean> = new BehaviorSubject(false);
+
+  public isAnfrageFormularVisible(): Observable<boolean> {
+    //FIX TEST
+    return this.showAnfrageFormular$.asObservable();
+    //
+  }
+
+  public showAnfrageFormular(): void {
+    this.showAnfrageFormular$.next(true);
+  }
+
+  public hideAnfrageFormular(): void {
+    this.showAnfrageFormular$.next(false);
+  }
+}
diff --git a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.html b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.html
index 1b3f1789b2628eb40f769cecdd17698bbe708e6d..03d11d5c710f87ba333b3f0205b4e6a110b036d0 100644
--- a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.html
+++ b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.html
@@ -1,5 +1,17 @@
-<ods-button variant="outline" text="Anfrage erstellen" dataTestId="anfrage-erstellen-button">
-  <ods-save-icon icon class="fill-text"></ods-save-icon>
-</ods-button>
+<ng-template #anfrageErstellenButton>
+  <ods-button
+    variant="outline"
+    text="Anfrage erstellen"
+    data-test-id="anfrage-erstellen-button"
+    (clickEmitter)="showAnfrageFormular()"
+  >
+    <ods-save-icon icon class="fill-text"></ods-save-icon>
+  </ods-button>
+</ng-template>
 
-dsadwad
+<ng-container *ngIf="isAnfrageFormularVisible$ | async; else anfrageErstellenButton">
+  <alfa-zustaendige-stelle-container
+    data-test-id="zustaendige-stelle-container"
+    (hideFormular)="hideFormular()"
+  ></alfa-zustaendige-stelle-container>
+</ng-container>
diff --git a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.scss b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.scss
deleted file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000
diff --git a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.spec.ts b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.spec.ts
index a2bc518a760d64e36e481958c7085004eaafd42b..14d69899dad43bc7bfcf1255116eaeb613f2c70c 100644
--- a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.spec.ts
+++ b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.spec.ts
@@ -1,15 +1,44 @@
+import {
+  Mock,
+  dispatchEventFromFixture,
+  existsAsHtmlElement,
+  mock,
+  notExistsAsHtmlElement,
+} from '@alfa-client/test-utils';
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { ButtonComponent, SaveIconComponent } from '@ods/system';
+import { CollaborationService } from 'libs/collaboration-shared/src/lib/collaboration.service';
+import { getDataTestIdOf } from 'libs/tech-shared/test/data-test';
+import { MockComponent } from 'ng-mocks';
+import { of } from 'rxjs';
 import { CollaborationInVorgangContainerComponent } from './collaboration-in-vorgang-container.component';
+import { ZustaendigeStelleContainerComponent } from './zustaendige-stelle-container/zustaendige-stelle-container.component';
 
 describe('CollaborationInVorgangContainerComponent', () => {
   let component: CollaborationInVorgangContainerComponent;
   let fixture: ComponentFixture<CollaborationInVorgangContainerComponent>;
 
+  const anfrageErstellenButton: string = getDataTestIdOf('anfrage-erstellen-button');
+  const zustaendigeStelleContainer: string = getDataTestIdOf('zustaendige-stelle-container');
+
+  const service: Mock<CollaborationService> = {
+    ...mock(CollaborationService),
+    isAnfrageFormularVisible: jest.fn().mockReturnValue(of(false)),
+  };
+
   beforeEach(async () => {
     await TestBed.configureTestingModule({
       imports: [ButtonComponent, SaveIconComponent],
-      declarations: [CollaborationInVorgangContainerComponent],
+      declarations: [
+        CollaborationInVorgangContainerComponent,
+        MockComponent(ZustaendigeStelleContainerComponent),
+      ],
+      providers: [
+        {
+          provide: CollaborationService,
+          useValue: service,
+        },
+      ],
     }).compileComponents();
 
     fixture = TestBed.createComponent(CollaborationInVorgangContainerComponent);
@@ -20,4 +49,71 @@ describe('CollaborationInVorgangContainerComponent', () => {
   it('should create', () => {
     expect(component).toBeTruthy();
   });
+
+  describe('ngOnInit', () => {
+    it('should call service', () => {
+      component.ngOnInit();
+
+      expect(service.isAnfrageFormularVisible).toHaveBeenCalled();
+    });
+  });
+
+  describe('anfrage erstellen button', () => {
+    describe('on anfrage formular visibility false', () => {
+      beforeEach(() => {
+        component.isAnfrageFormularVisible$ = of(false);
+      });
+
+      it('should be shown', () => {
+        fixture.detectChanges();
+
+        existsAsHtmlElement(fixture, anfrageErstellenButton);
+      });
+
+      it('should call service on click', () => {
+        fixture.detectChanges();
+
+        dispatchEventFromFixture(fixture, anfrageErstellenButton, 'clickEmitter');
+
+        expect(service.showAnfrageFormular).toHaveBeenCalled();
+      });
+    });
+
+    it('should be hidden if formular visibility is true', () => {
+      component.isAnfrageFormularVisible$ = of(true);
+
+      fixture.detectChanges();
+
+      notExistsAsHtmlElement(fixture, anfrageErstellenButton);
+    });
+  });
+
+  describe('zustaendige stelle', () => {
+    describe('on anfrage formular visibility true', () => {
+      beforeEach(() => {
+        component.isAnfrageFormularVisible$ = of(true);
+      });
+      it('should be shown', () => {
+        fixture.detectChanges();
+
+        existsAsHtmlElement(fixture, zustaendigeStelleContainer);
+      });
+
+      it('should call service on hideFormular output', () => {
+        fixture.detectChanges();
+
+        dispatchEventFromFixture(fixture, zustaendigeStelleContainer, 'hideFormular');
+
+        expect(service.hideAnfrageFormular).toHaveBeenCalled();
+      });
+    });
+
+    it('should be hidden if formular visibility is false', () => {
+      component.isAnfrageFormularVisible$ = of(false);
+
+      fixture.detectChanges();
+
+      notExistsAsHtmlElement(fixture, zustaendigeStelleContainer);
+    });
+  });
 });
diff --git a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.ts b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.ts
index 91db940d90a0195ced38a6aefe1966f06cb3dddc..c3c14cebfca8473ac116bc1a76f548c4c2748132 100644
--- a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.ts
+++ b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang-container.component.ts
@@ -1,8 +1,25 @@
-import { Component } from '@angular/core';
+import { Component, OnInit } from '@angular/core';
+import { CollaborationService } from 'libs/collaboration-shared/src/lib/collaboration.service';
+import { Observable } from 'rxjs';
 
 @Component({
   selector: 'alfa-collaboration-in-vorgang-container',
   templateUrl: './collaboration-in-vorgang-container.component.html',
-  styleUrls: ['./collaboration-in-vorgang-container.component.scss'],
 })
-export class CollaborationInVorgangContainerComponent {}
+export class CollaborationInVorgangContainerComponent implements OnInit {
+  public isAnfrageFormularVisible$: Observable<boolean>;
+
+  constructor(private service: CollaborationService) {}
+
+  ngOnInit(): void {
+    this.isAnfrageFormularVisible$ = this.service.isAnfrageFormularVisible();
+  }
+
+  public showAnfrageFormular(): void {
+    this.service.showAnfrageFormular();
+  }
+
+  public hideFormular(): void {
+    this.service.hideAnfrageFormular();
+  }
+}
diff --git a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component.html b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component.html
new file mode 100644
index 0000000000000000000000000000000000000000..6e905e5ef08a3ffc8043d3083fc528018fdeb1d5
--- /dev/null
+++ b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component.html
@@ -0,0 +1,17 @@
+ICON_PLATZHALTER
+<ods-button
+  variant="outline"
+  text="Zuständige Stelle auswählen"
+  dataTestId="zustaendige-stelle-search-button"
+>
+  <ods-save-icon icon class="fill-text"></ods-save-icon>
+</ods-button>
+
+<ods-button
+  variant="outline"
+  text="Abbrechen"
+  data-test-id="zustaendige-stelle-abbrechen-button"
+  (clickEmitter)="hideFormular.emit()"
+>
+  <ods-close-icon icon class="fill-text"></ods-close-icon>
+</ods-button>
diff --git a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component.spec.ts b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..44b14427ee5bf2bb5ec1ad38c90fe6426fa90b86
--- /dev/null
+++ b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component.spec.ts
@@ -0,0 +1,42 @@
+import { dispatchEventFromFixture } from '@alfa-client/test-utils';
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { ButtonComponent, CloseIconComponent, SaveIconComponent } from '@ods/system';
+import { getDataTestIdOf } from 'libs/tech-shared/test/data-test';
+import { MockComponent } from 'ng-mocks';
+import { ZustaendigeStelleContainerComponent } from './zustaendige-stelle-container.component';
+
+describe('ZustaendigeStelleContainerComponent', () => {
+  let component: ZustaendigeStelleContainerComponent;
+  let fixture: ComponentFixture<ZustaendigeStelleContainerComponent>;
+
+  const abbrechenButton: string = getDataTestIdOf('zustaendige-stelle-abbrechen-button');
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ButtonComponent],
+      declarations: [
+        ZustaendigeStelleContainerComponent,
+        MockComponent(SaveIconComponent),
+        MockComponent(CloseIconComponent),
+      ],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(ZustaendigeStelleContainerComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+
+  describe('abbrechen button', () => {
+    it('should emit hideFormular', () => {
+      const emitSpy = (component.hideFormular.emit = jest.fn());
+
+      dispatchEventFromFixture(fixture, abbrechenButton, 'clickEmitter');
+
+      expect(emitSpy).toHaveBeenCalled();
+    });
+  });
+});
diff --git a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component.ts b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component.ts
new file mode 100644
index 0000000000000000000000000000000000000000..316fc5d3e42870c274efee7e24df34cd7233cc22
--- /dev/null
+++ b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component.ts
@@ -0,0 +1,9 @@
+import { Component, EventEmitter, Output } from '@angular/core';
+
+@Component({
+  selector: 'alfa-zustaendige-stelle-container',
+  templateUrl: './zustaendige-stelle-container.component.html',
+})
+export class ZustaendigeStelleContainerComponent {
+  @Output() public hideFormular: EventEmitter<void> = new EventEmitter<void>();
+}
diff --git a/alfa-client/libs/collaboration/src/lib/collaboration.module.ts b/alfa-client/libs/collaboration/src/lib/collaboration.module.ts
index 49305c63a2962b28ee5fa74bcf377272d1b680fe..2847a5dd26eba7521f52d011549fb7b361caa550 100644
--- a/alfa-client/libs/collaboration/src/lib/collaboration.module.ts
+++ b/alfa-client/libs/collaboration/src/lib/collaboration.module.ts
@@ -1,11 +1,19 @@
+import { CollaborationSharedModule } from '@alfa-client/collaboration-shared';
 import { CommonModule } from '@angular/common';
 import { NgModule } from '@angular/core';
-import { ButtonComponent, SaveIconComponent } from '@ods/system';
+import { ButtonComponent, CloseIconComponent, SaveIconComponent } from '@ods/system';
 import { CollaborationInVorgangContainerComponent } from './collaboration-in-vorgang-container/collaboration-in-vorgang-container.component';
+import { ZustaendigeStelleContainerComponent } from './collaboration-in-vorgang-container/zustaendige-stelle-container/zustaendige-stelle-container.component';
 
 @NgModule({
-  imports: [CommonModule, ButtonComponent, SaveIconComponent],
-  declarations: [CollaborationInVorgangContainerComponent],
+  imports: [
+    CommonModule,
+    ButtonComponent,
+    SaveIconComponent,
+    CloseIconComponent,
+    CollaborationSharedModule,
+  ],
+  declarations: [CollaborationInVorgangContainerComponent, ZustaendigeStelleContainerComponent],
   exports: [CollaborationInVorgangContainerComponent],
 })
 export class CollaborationModule {}
diff --git a/alfa-client/tsconfig.base.json b/alfa-client/tsconfig.base.json
index dcd7a091e2e4c3e485af22ec4b92386bfee0394d..15284c9f0e8bc51994ae4e9b965a16c8b17d0bb6 100644
--- a/alfa-client/tsconfig.base.json
+++ b/alfa-client/tsconfig.base.json
@@ -24,6 +24,7 @@
       "@alfa-client/binary-file": ["libs/binary-file/src/index.ts"],
       "@alfa-client/binary-file-shared": ["libs/binary-file-shared/src/index.ts"],
       "@alfa-client/collaboration": ["libs/collaboration/src/index.ts"],
+      "@alfa-client/collaboration-shared": ["libs/collaboration-shared/src/index.ts"],
       "@alfa-client/command-shared": ["libs/command-shared/src/index.ts"],
       "@alfa-client/environment-shared": ["libs/environment-shared/src/index.ts"],
       "@alfa-client/forwarding": ["libs/forwarding/src/index.ts"],