Calling QueueUpdateProject method in OnSaved/OnPublished Event

Hi,

I'm trying to make changes to custom fields of Task level in OnSaved/OnPublished server side event handler. After making custom field updates in Project Data Set, calling  QueueUpdateProjectmethod and it was failing because the user who checked out the plan is different and the user who is executing the code(service account). 

Any impersonation technic or anyother way that would help to call QueueUpdateProjectin onSaved event?

Help is appreciated.

Thanks, Ram