diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7fe2195..fa8fd56 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- manipulation CreateEnsembleContextStateWithAssociation
 - manipulation PhysicallyDisconnectRemovableSubsystemAfterSettingActivationStateOnOrStndBy
 - manipulation RequestIndicationOfNextCalibrationTimeRequired for devices
 - manipulation IndicateTimeOfNextCalibrationToUser for devices
diff --git a/src/t2iapi/context/context_requests.proto b/src/t2iapi/context/context_requests.proto
index e5f1ced..39506b2 100644
--- a/src/t2iapi/context/context_requests.proto
+++ b/src/t2iapi/context/context_requests.proto
@@ -45,6 +45,14 @@ message CreateContextStateWithAssociationRequest {
     ContextAssociation context_association = 2;  // the initial association of the context state
 }
 
+/*
+Request to create or adapt a pm:EnsembleContextState with a given @ContextAssociation.
+ */
+message CreateEnsembleContextStateWithAssociationRequest {
+    string descriptor_handle = 1;
+    ContextAssociation context_association = 2;  // the initial association of the pm:EnsembleContextState
+}
+
 /*
 Request to create or adapt a pm:AbstractContextState instance with a given @ContextAssociation and a given number
 of pm:Validator elements.
diff --git a/src/t2iapi/context/context_responses.proto b/src/t2iapi/context/context_responses.proto
index 4f7c649..762e759 100644
--- a/src/t2iapi/context/context_responses.proto
+++ b/src/t2iapi/context/context_responses.proto
@@ -24,6 +24,14 @@ message CreateContextStateWithAssociationResponse {
     string context_state_handle = 2;  // handle of the context state, that was created or adapted
 }
 
+/*
+Response containing the handle of the newly created or adapted pm:EnsembleContextState.
+ */
+message CreateEnsembleContextStateWithAssociationResponse {
+    BasicResponse status = 1;
+    string ensemble_context_state_handle = 2;  // handle of the pm:EnsembleContextState, that was created or adapted
+}
+
 /*
 Response containing the context state handle and the prior mdib version.
  */
diff --git a/src/t2iapi/context/service.proto b/src/t2iapi/context/service.proto
index 82cdff1..b2d7dbf 100644
--- a/src/t2iapi/context/service.proto
+++ b/src/t2iapi/context/service.proto
@@ -58,6 +58,14 @@ service ContextService {
   rpc CreateContextStateWithAssociation (t2iapi.context.CreateContextStateWithAssociationRequest)
       returns (t2iapi.context.CreateContextStateWithAssociationResponse);
 
+  /*
+  Create or adapt a pm:EnsembleContextState instance with the given @ContextAssociation value for the given descriptor handle.
+  The manipulated state shall be persistent until a next manipulation call. If the device is not able to maintain
+  the static state, it shall return RESULT_NOT_SUPPORTED.
+   */
+  rpc CreateEnsembleContextStateWithAssociation (t2iapi.context.CreateEnsembleContextStateWithAssociationRequest)
+      returns (t2iapi.context.CreateEnsembleContextStateWithAssociationResponse);
+
   /*
   Create or adapt a pm:AbstractContextState instance with the given @ContextAssociation value for the given descriptor handle
   and provide at least the number of pm:Validator elements for this ContextState.