diff --git a/Source/Runtime/Events.Processing/EventHandlers.proto b/Source/Runtime/Events.Processing/EventHandlers.proto
index 85424b6..913bebd 100644
--- a/Source/Runtime/Events.Processing/EventHandlers.proto
+++ b/Source/Runtime/Events.Processing/EventHandlers.proto
@@ -13,49 +13,73 @@ import "Runtime/Events.Processing/Processors.proto";
 
 package dolittle.runtime.events.processing;
 
+import "google/protobuf/timestamp.proto";
+
+
 option csharp_namespace = "Dolittle.Runtime.Events.Processing.Contracts";
 option go_package = "go.dolittle.io/contracts/runtime/events/processing";
 
+// Determines where to start processing from if the event handler has no state
+message StartFrom{
+  oneof Selected {
+    Position position = 1;
+    google.protobuf.Timestamp timestamp = 2;
+    uint64 eventLogSequenceNumber = 3;
+  }
+
+  enum Position{
+    Start = 0;
+    Latest = 1;
+  }
+}
+
 message EventHandlerRegistrationRequest {
-    services.ReverseCallArgumentsContext callContext = 1;
-    protobuf.Uuid scopeId = 2;
-    protobuf.Uuid eventHandlerId = 3;
-    repeated artifacts.Artifact eventTypes = 4;
-    bool partitioned = 5;
-    optional string alias = 6;
+  services.ReverseCallArgumentsContext callContext = 1;
+  protobuf.Uuid scopeId = 2;
+  protobuf.Uuid eventHandlerId = 3;
+  repeated artifacts.Artifact eventTypes = 4;
+  bool partitioned = 5;
+  optional string alias = 6;
+  // Optionally, the event handler can be specified to start at a specific point in time, a specific offset or start from the latest events
+  // Default, the handler will start from the beginning
+  optional StartFrom startFrom = 7;
+  // If this handler should not process events produced after a given time, populate this field 
+  optional google.protobuf.Timestamp stopAt = 8;
+  // How many events to allow to be processed in-flight simultaneously. Defaults to 1
+  int32 concurrency = 9;
 }
 
 message EventHandlerResponse {
-    services.ReverseCallResponseContext callContext = 1;
-    ProcessorFailure failure = 2; // If not set/empty - no failure
+  services.ReverseCallResponseContext callContext = 1;
+  ProcessorFailure failure = 2; // If not set/empty - no failure
 }
 
 message EventHandlerClientToRuntimeMessage {
-    oneof Message {
-        EventHandlerRegistrationRequest registrationRequest = 1;
-        EventHandlerResponse handleResult = 2;
-        services.Pong pong = 3;
-    }
+  oneof Message {
+    EventHandlerRegistrationRequest registrationRequest = 1;
+    EventHandlerResponse handleResult = 2;
+    services.Pong pong = 3;
+  }
 }
 
 message EventHandlerRegistrationResponse {
-    protobuf.Failure failure = 1;
+  protobuf.Failure failure = 1;
 }
 
 message HandleEventRequest {
-    services.ReverseCallRequestContext callContext = 1;
-    StreamEvent event = 2;
-    RetryProcessingState retryProcessingState = 3;
+  services.ReverseCallRequestContext callContext = 1;
+  StreamEvent event = 2;
+  RetryProcessingState retryProcessingState = 3;
 }
 
 message EventHandlerRuntimeToClientMessage {
-    oneof Message {
-        EventHandlerRegistrationResponse registrationResponse = 1;
-        HandleEventRequest handleRequest = 2;
-        services.Ping ping = 3;
-    }
+  oneof Message {
+    EventHandlerRegistrationResponse registrationResponse = 1;
+    HandleEventRequest handleRequest = 2;
+    services.Ping ping = 3;
+  }
 }
 
 service EventHandlers {
-    rpc Connect(stream EventHandlerClientToRuntimeMessage) returns(stream EventHandlerRuntimeToClientMessage);
+  rpc Connect(stream EventHandlerClientToRuntimeMessage) returns(stream EventHandlerRuntimeToClientMessage);
 }
diff --git a/Source/Runtime/Management/Events.Processing/EventHandlers.proto b/Source/Runtime/Management/Events.Processing/EventHandlers.proto
index e97aee0..59c2257 100644
--- a/Source/Runtime/Management/Events.Processing/EventHandlers.proto
+++ b/Source/Runtime/Management/Events.Processing/EventHandlers.proto
@@ -7,6 +7,7 @@ import "Artifacts/Artifact.proto";
 import "Protobuf/Uuid.proto";
 import "Protobuf/Failure.proto";
 import "Runtime/Management/Events.Processing/StreamProcessors.proto";
+import "google/protobuf/timestamp.proto";
 
 package dolittle.runtime.events.processing.management;
 
@@ -25,6 +26,18 @@ message ReprocessEventsFromResponse {
     protobuf.Failure failure = 1; // not set if not failed
 }
 
+message ReprocessEventsFromTimestampRequest {
+    // Tenant is optional here, allowing to update multiple tenants at once if not specified
+    optional protobuf.Uuid tenantId = 1;
+    protobuf.Uuid scopeId = 2;
+    protobuf.Uuid eventHandlerId = 3;
+    uint64 streamPosition = 4;
+}
+
+message ReprocessEventsFromTimestampResponse {
+    protobuf.Failure failure = 1; // not set if not failed
+}
+
 message ReprocessAllEventsRequest {
     // TODO: Do we want another kind of execution context here?
     protobuf.Uuid scopeId = 1;
@@ -68,6 +81,7 @@ message GetOneResponse {
 
 service EventHandlers {
     rpc ReprocessEventsFrom(ReprocessEventsFromRequest) returns(ReprocessEventsFromResponse);
+    rpc ReprocessEventsFromTimestamp(ReprocessEventsFromTimestampRequest) returns(ReprocessEventsFromTimestampResponse);
     rpc ReprocessAllEvents(ReprocessAllEventsRequest) returns(ReprocessAllEventsResponse);
     rpc GetAll(GetAllRequest) returns(GetAllResponse);
     rpc GetOne(GetOneRequest) returns(GetOneResponse);