diff --git a/collaboration-manager-server/src/main/java/de/ozgcloud/collaboration/CollaborationRequestMapper.java b/collaboration-manager-server/src/main/java/de/ozgcloud/collaboration/CollaborationRequestMapper.java
index 219e2c3ed0ed4b6834afbfa56e63e21370b38214..8fff61717ae74b22472b217dcc21e3ee4a3ac9d8 100644
--- a/collaboration-manager-server/src/main/java/de/ozgcloud/collaboration/CollaborationRequestMapper.java
+++ b/collaboration-manager-server/src/main/java/de/ozgcloud/collaboration/CollaborationRequestMapper.java
@@ -49,8 +49,12 @@ import de.ozgcloud.command.Command;
 import de.ozgcloud.vorgang.vorgang.GrpcCreateCollaborationRequestData;
 
 @AnnotateWith(value = Component.class, elements = @AnnotateWith.Element(strings = CollaborationManagerConfiguration.COLLABORATION_REQUEST_MAPPER_NAME))
-@Mapper(uses = {
-		CommandMapper.class }, unmappedTargetPolicy = ReportingPolicy.WARN, unmappedSourcePolicy = ReportingPolicy.WARN, nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE, nullValueCheckStrategy = NullValueCheckStrategy.ALWAYS, collectionMappingStrategy = CollectionMappingStrategy.ADDER_PREFERRED)
+@Mapper(uses = { CommandMapper.class }, //
+		unmappedTargetPolicy = ReportingPolicy.WARN, //
+		unmappedSourcePolicy = ReportingPolicy.WARN, //
+		nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE, //
+		nullValueCheckStrategy = NullValueCheckStrategy.ALWAYS, //
+		collectionMappingStrategy = CollectionMappingStrategy.ADDER_PREFERRED)
 public abstract class CollaborationRequestMapper {
 
 	static final String ITEM_NAME = "CollaborationRequest";
@@ -155,10 +159,7 @@ public abstract class CollaborationRequestMapper {
 
 	@SuppressWarnings("unchecked")
 	Fachstelle getZustaendigeStelleFromItemMap(Map<String, Object> propertyMap) {
-		var fachstelle = (Map<String, Object>) propertyMap.get(CollaborationRequest.PROPERTY_ZUSTAENDIGE_STELLE);
-		var technicalId = getStringProperty(Fachstelle.PROPERTY_TECHNICAL_ID, fachstelle);
-		var collaborationLevel = getIntProperty(CollaborationRequest.PROPERTY_COLLABORATION_LEVEL, propertyMap);
-		return fachstelleService.getFachstelle(technicalId, collaborationLevel);
+		return fachstelleMapper.fromMap((Map<String, Object>) propertyMap.get(CollaborationRequest.PROPERTY_ZUSTAENDIGE_STELLE));
 	}
 
 	int getIntProperty(String key, Map<String, Object> propertyMap) {
diff --git a/collaboration-manager-server/src/main/java/de/ozgcloud/collaboration/fachstelle/FachstelleMapper.java b/collaboration-manager-server/src/main/java/de/ozgcloud/collaboration/fachstelle/FachstelleMapper.java
index dfc9c6b47e81e77d881e7918e9be163bd1330648..a7dc28c1b65e3ea1afb6bf34acc880eb739d4bbb 100644
--- a/collaboration-manager-server/src/main/java/de/ozgcloud/collaboration/fachstelle/FachstelleMapper.java
+++ b/collaboration-manager-server/src/main/java/de/ozgcloud/collaboration/fachstelle/FachstelleMapper.java
@@ -6,25 +6,28 @@ import org.mapstruct.AnnotateWith;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
 import org.mapstruct.NullValueCheckStrategy;
+import org.mapstruct.NullValuePropertyMappingStrategy;
 import org.mapstruct.ReportingPolicy;
 import org.springframework.stereotype.Component;
 
 import de.ozgcloud.collaboration.CollaborationManagerConfiguration;
+import de.ozgcloud.collaboration.fachstelle.Fachstelle.FachstelleType;
 import de.ozgcloud.zufi.grpc.fachstelle.GrpcFachstelle;
 import de.ozgcloud.zufi.grpc.organisationseinheit.GrpcOrganisationsEinheit;
 
-@Mapper(unmappedTargetPolicy = ReportingPolicy.WARN, nullValueCheckStrategy = NullValueCheckStrategy.ALWAYS)
+@Mapper(unmappedTargetPolicy = ReportingPolicy.WARN, nullValueCheckStrategy = NullValueCheckStrategy.ALWAYS, nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE, //
+		imports = FachstelleType.class)
 @AnnotateWith(value = Component.class, elements = @AnnotateWith.Element(strings = CollaborationManagerConfiguration.FACHSTELLE_MAPPER_NAME))
 public interface FachstelleMapper {
 
 	@Mapping(target = "technicalId", source = "id")
 	@Mapping(target = "subjectId", source = "mukId")
-	@Mapping(target = "type", constant = "EXTERNE_FACHSTELLE")
+	@Mapping(target = "type", expression = "java(FachstelleType.EXTERNE_FACHSTELLE)")
 	Fachstelle fromExterneFachstelle(GrpcFachstelle externeFachstelle);
 
 	@Mapping(target = "technicalId", source = "id")
 	@Mapping(target = "subjectId", source = "xzufiId.id")
-	@Mapping(target = "type", constant = "ORGANISATIONS_EINHEIT")
+	@Mapping(target = "type", expression = "java(FachstelleType.ORGANISATIONS_EINHEIT)")
 	Fachstelle fromOrganisationsEinheit(GrpcOrganisationsEinheit organisationsEinheit);
 
 	default Map<String, Object> toMap(Fachstelle fachstelle) {
@@ -33,4 +36,12 @@ public interface FachstelleMapper {
 				Fachstelle.PROPERTY_SUBJECT_ID, fachstelle.getSubjectId(),
 				Fachstelle.PROPERTY_TYPE, fachstelle.getType().name());
 	}
+
+	default Fachstelle fromMap(Map<String, Object> fachstelleMap) {
+		return Fachstelle.builder()
+				.technicalId((String) fachstelleMap.get(Fachstelle.PROPERTY_TECHNICAL_ID))
+				.subjectId((String) fachstelleMap.get(Fachstelle.PROPERTY_SUBJECT_ID))
+				.type(FachstelleType.valueOf((String) fachstelleMap.get(Fachstelle.PROPERTY_TYPE)))
+				.build();
+	}
 }
diff --git a/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/CollaborationRequestMapperTest.java b/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/CollaborationRequestMapperTest.java
index b81b562d90f1507ddd96dcc5e781a63788ba056f..87aec78c83b80e76b24f865f2542134586bee3be 100644
--- a/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/CollaborationRequestMapperTest.java
+++ b/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/CollaborationRequestMapperTest.java
@@ -46,7 +46,6 @@ import de.ozgcloud.apilib.vorgang.OzgCloudVorgangId;
 import de.ozgcloud.collaboration.common.callcontext.CollaborationManagerCallContextGrpcClientInterceptor;
 import de.ozgcloud.collaboration.common.vorgang.attached_item.VorgangAttachedItem;
 import de.ozgcloud.collaboration.common.vorgang.attached_item.VorgangAttachedItemTestFactory;
-import de.ozgcloud.collaboration.fachstelle.Fachstelle;
 import de.ozgcloud.collaboration.fachstelle.FachstelleMapper;
 import de.ozgcloud.collaboration.fachstelle.FachstelleService;
 import de.ozgcloud.collaboration.fachstelle.FachstelleTestFactory;
@@ -348,16 +347,16 @@ class CollaborationRequestMapperTest {
 		private final Map<String, Object> itemMap = CollaborationRequestTestFactory.createAsMap();
 
 		@Test
-		void shouldGetFachstelle() {
+		void shouldMapFachstelle() {
 			mapper.getZustaendigeStelleFromItemMap(itemMap);
 
-			verify(fachstelleService).getFachstelle(FachstelleTestFactory.TECHNICAL_ID, CollaborationRequestTestFactory.COLLABORATION_LEVEL);
+			verify(fachstelleMapper).fromMap(CollaborationRequestTestFactory.FACHSTELLE_MAP);
 		}
 
 		@Test
 		void shouldReturnFachstelle() {
-			Fachstelle expectedFachstelle = FachstelleTestFactory.create();
-			when(fachstelleService.getFachstelle(anyString(), anyInt())).thenReturn(expectedFachstelle);
+			var expectedFachstelle = FachstelleTestFactory.create();
+			when(fachstelleMapper.fromMap(any())).thenReturn(expectedFachstelle);
 
 			var actualFachstelle = mapper.getZustaendigeStelleFromItemMap(itemMap);
 
diff --git a/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/CollaborationRequestTestFactory.java b/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/CollaborationRequestTestFactory.java
index 4d1ff2c232a5ef16e46c636a7a51ed0fc62d726e..0d876d921b9ca47011a2c46ec934b4be2bdd2dae 100644
--- a/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/CollaborationRequestTestFactory.java
+++ b/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/CollaborationRequestTestFactory.java
@@ -45,6 +45,7 @@ public class CollaborationRequestTestFactory {
 	public static final String COLLABORATION_VORGANG_ID = UUID.randomUUID().toString();
 	public static final int COLLABORATION_LEVEL = 1;
 	public static final Fachstelle ZUSTAENDIGE_STELLE = FachstelleTestFactory.create();
+	public static final Map<String, Object> FACHSTELLE_MAP = FachstelleTestFactory.createAsMap();
 
 	public static CollaborationRequest create() {
 		return createBuilder().build();
@@ -73,6 +74,6 @@ public class CollaborationRequestTestFactory {
 				CollaborationRequest.PROPERTY_CREATED_BY, CommandTestFactory.CREATED_BY,
 				CollaborationRequest.PROPERTY_TITEL, TITEL,
 				CollaborationRequest.PROPERTY_BESCHREIBUNG, BESCHREIBUNG,
-				CollaborationRequest.PROPERTY_ZUSTAENDIGE_STELLE, FachstelleTestFactory.createAsMap());
+				CollaborationRequest.PROPERTY_ZUSTAENDIGE_STELLE, FACHSTELLE_MAP);
 	}
 }
diff --git a/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/fachstelle/FachstelleMapperTest.java b/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/fachstelle/FachstelleMapperTest.java
index 5cbe67892d995458904fe69f10a224aff84309bc..62906be89475ac5a4b6d154306fcd5b7a833cb5e 100644
--- a/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/fachstelle/FachstelleMapperTest.java
+++ b/collaboration-manager-server/src/test/java/de/ozgcloud/collaboration/fachstelle/FachstelleMapperTest.java
@@ -42,7 +42,7 @@ class FachstelleMapperTest {
 	class TestToMap {
 
 		@Test
-		void shouldMapToFachstelle() {
+		void shouldMapToFachstelleMap() {
 			var expectedMap = FachstelleTestFactory.createAsMap();
 
 			var actualMap = mapper.toMap(FachstelleTestFactory.create());
@@ -50,4 +50,15 @@ class FachstelleMapperTest {
 			assertThat(actualMap).usingRecursiveComparison().isEqualTo(expectedMap);
 		}
 	}
+
+	@Nested
+	class TestFromMap {
+
+		@Test
+		void shouldMapToFachstelle() {
+			var fachstelle = mapper.fromMap(FachstelleTestFactory.createAsMap());
+
+			assertThat(fachstelle).isEqualTo(FachstelleTestFactory.create());
+		}
+	}
 }