Unfortunately many agencies which are grant funded don't have a mechanism for building in the organization cost of mentoring and knowledge transfer.  The grant pays for X named resources and that's all you get.  When one of those resources leaves it is often several months before a replacement is found and that is after the window for knowledge transfer has closed.  One organization I support has 4 staff assigned.  One just passed away and it will be at least 4 months before a replacement is found.  Another staff member retires in 5 months and still another next year.  Each does a unique job and there is no current mechanism for knowledge transfer.  Trying to change to a matrixed organization that would allow KT is getting a lot of push-back from management because it changes the accounting.