diff --git a/src/main/java/de/hmmh/pmt/ApiController.java b/src/main/java/de/hmmh/pmt/ApiController.java
index 26fc2b7..36761f9 100644
--- a/src/main/java/de/hmmh/pmt/ApiController.java
+++ b/src/main/java/de/hmmh/pmt/ApiController.java
@@ -19,6 +19,7 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestClientException;
 
+import java.time.ZoneOffset;
 import java.util.List;
 import java.util.Optional;
 
@@ -121,8 +122,8 @@ public class ApiController implements DefaultApi {
             return new ResponseEntity<>(HttpStatus.UNPROCESSABLE_ENTITY);
         }
 
-        long start = project.getStart().toEpochSecond(null);
-        long plannedEnd = project.getPlannedEnd().toEpochSecond(null);
+        long start = project.getStart().toEpochSecond(ZoneOffset.UTC);
+        long plannedEnd = project.getPlannedEnd().toEpochSecond(ZoneOffset.UTC);
         List<Allocation> allocations = allocationRepository.findAllocationsByEmployeeId(body.getEmployeeId());
         if (allocations.stream()
                 .map(Allocation::getProject)
diff --git a/src/test/java/de/hmmh/pmt/project/AddEmployeeTest.java b/src/test/java/de/hmmh/pmt/project/AddEmployeeTest.java
new file mode 100644
index 0000000..8ca9623
--- /dev/null
+++ b/src/test/java/de/hmmh/pmt/project/AddEmployeeTest.java
@@ -0,0 +1,59 @@
+package de.hmmh.pmt.project;
+
+import de.hmmh.pmt.IntegrationTest;
+import de.hmmh.pmt.db.Project;
+import de.hmmh.pmt.dtos.AddEmployeeDTO;
+import de.hmmh.pmt.employee.dtos.EmployeeResponseDTO;
+import de.hmmh.pmt.employee.dtos.QualificationGetDTO;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.RequestBuilder;
+import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.web.client.HttpClientErrorException;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static com.github.dockerjava.zerodep.shaded.org.apache.hc.core5.http.io.support.ClassicRequestBuilder.post;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.when;
+
+public class AddEmployeeTest extends IntegrationTest {
+
+    @Test
+    void addValidEmployee() throws Exception {
+        EmployeeResponseDTO employee= new EmployeeResponseDTO();
+        employee.setId(2L);
+        employee.setSkillSet(List.of(newQualification(1L)));
+        when(mockEmployeeApi.findById(anyLong()))
+                .thenReturn(employee);
+
+        Map<String, Project> allProjects = createTestProjectData();
+        AddEmployeeDTO addEmployeeDTO = new AddEmployeeDTO();
+        addEmployeeDTO.setEmployeeId(1L);
+        addEmployeeDTO.setQualificationId(1L);
+        RequestBuilder request = MockMvcRequestBuilders
+                .post(baseUri + "/project/" + allProjects.get("research-lab").getId())
+                .contentType(MediaType.APPLICATION_JSON)
+                .content(this.objectMapper.writeValueAsString(addEmployeeDTO));
+
+        this.mvc
+                .perform(request)
+                .andExpect(status().isNoContent());
+    }
+
+
+    private static QualificationGetDTO newQualification(Long id){
+        QualificationGetDTO qualificationGetDTO = new QualificationGetDTO();
+        qualificationGetDTO.setId(id);
+        return qualificationGetDTO;
+    }
+
+
+}