One of my players is planning something real devious, he wants to kill a deathwatch member and essentially steal his identity to break into a Loyalist chapter to subvert high ranking members of the Chapter and steal Geneseed. I would love to run this, he sounds like he has a really clever plan for it and he's been lagging behind the rest of the team in infamy for awhile, so this is a perfect opportunity to bring him up to everyone else's level. Problem is though, I have no idea what kind of stats the higher ups of a chapter would have. Any ideas?

Make a top level Deathwach brother and stat out to became a leader ( Watch Captain) or chief Libarian ( Epistolary). Or lurk the Deathwatch books for a stand in npc. (Probably: The Jericho Reach, The Achilus Assult).