diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Contact.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Contact.java
index 0b237e1..ce88444 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Contact.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Contact.java
@@ -21,6 +21,8 @@ import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+import javax.persistence.NamedQueries;
+import javax.persistence.NamedQuery;
 import javax.persistence.Table;
 
 import static org.scientificcms.contenttypes.sciproject.SciProjectConstants.*;
@@ -29,9 +31,15 @@ import static org.scientificcms.contenttypes.sciproject.SciProjectConstants.*;
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
-@Entity(name = "ProjectContact")
+@Entity(name = "SciProjectContact")
 @Audited
 @Table(name = "PROJECT_CONTACTS", schema = DB_SCHEMA)
+@NamedQueries({
+    @NamedQuery(
+        name = "SciProjectContact.findByUuid",
+        query = "SELECT c FROM SciProjectContact c WHERE c.uuid = :uuid"
+    )
+})
 public class Contact implements Exportable, Serializable {
 
     private static final long serialVersionUID = 1L;
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactImExporter.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactImExporter.java
index 3af13cd..2f8c7e6 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactImExporter.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactImExporter.java
@@ -9,12 +9,12 @@ import org.librecms.assets.Person;
 import org.librecms.contentsection.ContentItemRepository;
 
 import java.util.Objects;
+import java.util.Optional;
 import java.util.Set;
 
 import javax.annotation.PostConstruct;
 import javax.enterprise.context.RequestScoped;
 import javax.inject.Inject;
-import javax.transaction.Transactional;
 
 /**
  * Importer/Exporter for {@link Contact} entities.
@@ -25,14 +25,14 @@ import javax.transaction.Transactional;
 @Processes(Contact.class)
 public class ContactImExporter
     extends AbstractEntityImExporter<Contact> {
-    
+
     private static final Logger LOGGER = LogManager.getLogger(
         ContactImExporter.class
     );
 
     @Inject
     private ContactRepository contactRepo;
-    
+
     @Inject
     private ContentItemRepository itemRepo;
 
@@ -54,10 +54,34 @@ public class ContactImExporter
     }
 
     @Override
-    @Transactional(Transactional.TxType.REQUIRED)
+    protected Optional<Contact> findExistingEntity(final String uuid) {
+        return contactRepo.findByUuid(uuid);
+
+    }
+
+    @Override
     protected void saveImportedEntity(final Contact entity) {
         contactRepo.save(entity);
     }
+    
+    @Override
+    protected void updateExistingEntity(
+        final Contact existingEntity,
+        final Contact importedEntity
+    ) {
+        if (!Objects.equals(
+            existingEntity.getContactType(),
+            importedEntity.getContactType()
+        )) {
+            existingEntity.setContactType(importedEntity.getContactType());
+        }
+        
+        if (existingEntity.getOrder() != importedEntity.getOrder()) {
+            existingEntity.setOrder(importedEntity.getOrder());
+        }
+        
+        contactRepo.save(existingEntity);
+    }
 
     @Override
     protected Contact reloadEntity(final Contact entity) {
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactRepository.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactRepository.java
index 77c637d..aaa4857 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactRepository.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactRepository.java
@@ -2,9 +2,12 @@ package org.scientificcms.contenttypes.sciproject;
 
 import org.libreccm.auditing.AbstractAuditedEntityRepository;
 
+import java.util.Optional;
 import java.util.UUID;
 
 import javax.enterprise.context.RequestScoped;
+import javax.persistence.NoResultException;
+import javax.transaction.Transactional;
 
 /**
  *
@@ -45,5 +48,19 @@ public class ContactRepository
     public void initNewEntity(final Contact contact) {
         contact.setUuid(UUID.randomUUID().toString());
     }
+    
+    @Transactional(Transactional.TxType.REQUIRED)
+    public Optional<Contact> findByUuid(final String uuid) {
+       try {
+        return Optional.of(
+            getEntityManager()
+            .createNamedQuery("SciProjectContact.findByUuid", Contact.class)
+            .setParameter("uuid", uuid)
+            .getSingleResult()
+        );
+       } catch(NoResultException ex) {
+           return Optional.empty();
+       }
+    }
 
 }
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Membership.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Membership.java
index 92c6e98..59e0c0f 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Membership.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Membership.java
@@ -20,6 +20,8 @@ import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+import javax.persistence.NamedQueries;
+import javax.persistence.NamedQuery;
 import javax.persistence.Table;
 
 import static org.scientificcms.contenttypes.sciproject.SciProjectConstants.*;
@@ -28,7 +30,7 @@ import static org.scientificcms.contenttypes.sciproject.SciProjectConstants.*;
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
-@Entity(name = "PROJECT_MEMBERSHIP")
+@Entity(name = "SciProjectMembership")
 @Audited
 @Table(name = "PROJECT_MEMBERSHIPS", schema = DB_SCHEMA)
 @JsonIdentityInfo(
@@ -36,6 +38,12 @@ import static org.scientificcms.contenttypes.sciproject.SciProjectConstants.*;
     property = "uuid",
     scope = Membership.class
 )
+@NamedQueries({
+    @NamedQuery(
+        name = "SciProjectMembership.findByUuid",
+        query = "SELECT m FROM SciProjectMembership m WHERE m.uuid = :uuid"
+    )
+})
 public class Membership implements Exportable, Serializable {
 
     private static final long serialVersionUID = 1L;
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipImExporter.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipImExporter.java
index 71f6981..18e4835 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipImExporter.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipImExporter.java
@@ -6,12 +6,12 @@ import org.librecms.assets.Person;
 import org.librecms.contentsection.ContentItemRepository;
 
 import java.util.Objects;
+import java.util.Optional;
 import java.util.Set;
 
 import javax.annotation.PostConstruct;
 import javax.enterprise.context.RequestScoped;
 import javax.inject.Inject;
-import javax.transaction.Transactional;
 
 /**
  * Importer/Exporter for {@link Membership} entities.
@@ -25,7 +25,7 @@ public class MembershipImExporter
 
     @Inject
     private ContentItemRepository itemRepo;
-    
+
     @Inject
     private MembershipRepository membershipRepo;
 
@@ -46,11 +46,34 @@ public class MembershipImExporter
     }
 
     @Override
-    @Transactional(Transactional.TxType.REQUIRED)
+    protected Optional<Membership> findExistingEntity(final String uuid) {
+        return membershipRepo.findByUuid(uuid);
+    }
+
+    @Override
     protected void saveImportedEntity(final Membership entity) {
         membershipRepo.save(entity);
     }
 
+    @Override
+    protected void updateExistingEntity(
+        final Membership existingEntity,
+        final Membership importedEntity
+    ) {
+        if (!Objects.equals(
+            existingEntity.getRole(),
+            importedEntity.getRole()
+        )) {
+            existingEntity.setRole(importedEntity.getRole());
+        }
+
+        if (existingEntity.getStatus() != importedEntity.getStatus()) {
+            existingEntity.setStatus(importedEntity.getStatus());
+        }
+
+        membershipRepo.save(existingEntity);
+    }
+
     @Override
     protected Membership reloadEntity(final Membership entity) {
         return membershipRepo
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipRepository.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipRepository.java
index 87e9f70..956aad1 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipRepository.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipRepository.java
@@ -2,7 +2,12 @@ package org.scientificcms.contenttypes.sciproject;
 
 import org.libreccm.auditing.AbstractAuditedEntityRepository;
 
+import java.util.Optional;
+
+import javax.ejb.TransactionAttribute;
 import javax.enterprise.context.RequestScoped;
+import javax.persistence.NoResultException;
+import javax.transaction.Transactional;
 
 /**
  *
@@ -39,4 +44,21 @@ public class MembershipRepository
         return membership.getMembershipId() == 0;
     }
 
+    @Transactional(Transactional.TxType.REQUIRED)
+    public Optional<Membership> findByUuid(final String uuid) {
+        try {
+            return Optional.of(
+                getEntityManager()
+                    .createNamedQuery(
+                        "SciProjectMembership.findByUuid",
+                        Membership.class
+                    )
+                    .setParameter("uuid", uuid)
+                    .getSingleResult()
+            );
+        } catch (NoResultException ex) {
+            return Optional.empty();
+        }
+    }
+
 }
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SciProjectImExporter.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SciProjectImExporter.java
index 15e22df..9bcaf09 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SciProjectImExporter.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SciProjectImExporter.java
@@ -8,6 +8,8 @@ package org.scientificcms.contenttypes.sciproject;
 import org.libreccm.imexport.Processes;
 import org.librecms.contentsection.AbstractContentItemImExporter;
 
+import java.util.Objects;
+
 import javax.enterprise.context.RequestScoped;
 
 /**
@@ -16,16 +18,77 @@ import javax.enterprise.context.RequestScoped;
  */
 @RequestScoped
 @Processes(SciProject.class)
-public class SciProjectImExporter extends AbstractContentItemImExporter<SciProject>{
+public class SciProjectImExporter
+    extends AbstractContentItemImExporter<SciProject> {
 
     @Override
     protected void initContentItemImExporter() {
         // Nothing
     }
-    
+
     @Override
     public Class<SciProject> getEntityClass() {
         return SciProject.class;
     }
-    
+
+    @Override
+    protected void updateExistingContentItem(
+        final SciProject existingContentItem,
+        final SciProject importedContentItem
+    ) {
+        if (!Objects.equals(
+            existingContentItem.getBegin(),
+            importedContentItem.getBegin()
+        )) {
+            existingContentItem.setBegin(importedContentItem.getBegin());
+        }
+
+        if (!Objects.equals(
+            existingContentItem.getEnd(),
+            importedContentItem.getEnd()
+        )) {
+            existingContentItem.setEnd(importedContentItem.getEnd());
+        }
+
+        if (!Objects.equals(
+            existingContentItem.getShortDescription(),
+            importedContentItem.getShortDescription()
+        )) {
+            syncLocalizedStrings(
+                importedContentItem.getShortDescription(),
+                existingContentItem.getShortDescription()
+            );
+        }
+
+        if (!Objects.equals(
+            existingContentItem.getDescription(),
+            importedContentItem.getDescription()
+        )) {
+            syncLocalizedStrings(
+                importedContentItem.getDescription(),
+                existingContentItem.getDescription()
+            );
+        }
+
+        if (!Objects.equals(
+            existingContentItem.getFunding(),
+            importedContentItem.getFunding()
+        )) {
+            syncLocalizedStrings(
+                importedContentItem.getFunding(),
+                existingContentItem.getFunding()
+            );
+        }
+
+        if (!Objects.equals(
+            existingContentItem.getFundingVolume(),
+            importedContentItem.getFundingVolume()
+        )) {
+            syncLocalizedStrings(
+                importedContentItem.getFundingVolume(),
+                existingContentItem.getFundingVolume()
+            );
+        }
+    }
+
 }
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Sponsoring.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Sponsoring.java
index 1abdc39..381afee 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Sponsoring.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Sponsoring.java
@@ -16,6 +16,8 @@ import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+import javax.persistence.NamedQueries;
+import javax.persistence.NamedQuery;
 import javax.persistence.Table;
 
 import static org.scientificcms.contenttypes.sciproject.SciProjectConstants.*;
@@ -27,6 +29,12 @@ import static org.scientificcms.contenttypes.sciproject.SciProjectConstants.*;
 @Entity
 @Audited
 @Table(name = "SPONSORING", schema = DB_SCHEMA)
+@NamedQueries({
+    @NamedQuery(
+        name = "Sponsoring.findByUuid",
+        query = "SELECT s FROM Sponsoring s WHERE s.uuid = :uuid"
+    )
+})
 public class Sponsoring implements Exportable, Serializable {
 
     private static final long serialVersionUID = 1L;
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SponsoringImExporter.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SponsoringImExporter.java
index a734cfa..40a8725 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SponsoringImExporter.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SponsoringImExporter.java
@@ -5,12 +5,12 @@ import org.libreccm.imexport.Processes;
 import org.librecms.assets.Organization;
 
 import java.util.Objects;
+import java.util.Optional;
 import java.util.Set;
 
 import javax.annotation.PostConstruct;
 import javax.enterprise.context.RequestScoped;
 import javax.inject.Inject;
-import javax.transaction.Transactional;
 
 /**
  * Importer/Exporter for {@link Membership} entities.
@@ -40,12 +40,33 @@ public class SponsoringImExporter
     public Class<Sponsoring> getEntityClass() {
         return Sponsoring.class;
     }
+    
+    @Override
+    protected Optional<Sponsoring> findExistingEntity(final String uuid) {
+        return sponsoringRepo.findByUuid(uuid);
+    }
 
     @Override
-    @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final Sponsoring entity) {
         sponsoringRepo.save(entity);
     }
+    
+    @Override
+    protected void updateExistingEntity(
+        final Sponsoring existingEntity,
+        final Sponsoring importedEntity
+    ) {
+        if (!Objects.equals(
+            existingEntity.getFundingCode(),
+            importedEntity.getFundingCode()
+        )) {
+            existingEntity.setFundingCode(importedEntity.getFundingCode());
+        }
+        
+        if (existingEntity.getOrder() != importedEntity.getOrder()) {
+            existingEntity.setOrder(importedEntity.getOrder());
+        }
+    }
 
     @Override
     protected Sponsoring reloadEntity(final Sponsoring entity) {
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SponsoringRepository.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SponsoringRepository.java
index b1744d7..32f792b 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SponsoringRepository.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SponsoringRepository.java
@@ -2,7 +2,11 @@ package org.scientificcms.contenttypes.sciproject;
 
 import org.libreccm.auditing.AbstractAuditedEntityRepository;
 
+import java.util.Optional;
+
 import javax.enterprise.context.RequestScoped;
+import javax.persistence.NoResultException;
+import javax.transaction.Transactional;
 
 /**
  *
@@ -36,8 +40,22 @@ public class SponsoringRepository
 
     @Override
     public boolean isNew(final Sponsoring sponsoring) {
-        return sponsoring.getSponsoringId() == 0 
-               || sponsoring.getUuid() == null;
+        return sponsoring.getSponsoringId() == 0
+                   || sponsoring.getUuid() == null;
+    }
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    public Optional<Sponsoring> findByUuid(final String uuid) {
+        try {
+            return Optional.of(
+                getEntityManager()
+                    .createNamedQuery("Sponsoring.findByUuid", Sponsoring.class)
+                    .setParameter("uuid", uuid)
+                    .getSingleResult()
+            );
+        } catch (NoResultException ex) {
+            return Optional.empty();
+        }
     }
 
 }