Adeptus Magos

Who is this robot, and why is it my boss?
First of all, you are NOT the chief engineer. You are a high ranking member of the galaxy-spanning Adeptus Mechanicus. It is your sacred duty to care for and protect the machines and your tech-priests, but you also must maintain relations between the filthy, unenlightened heathens, and the venerable Adeptus Mechanicus. You have arguably (and I mean arguably) more authority than the Lord Commander, and if they forget this, attempt to remind them.

Can I haz Chimera?
Yes Magos, you may has Chimera. It is found in the north of the Enginarium, inside the "Gravity Control Chamber". Use your wrench of Saint Allen on the box, and build anything except an Inquisitorial Chimera (Impersonating the Inquisition in punishable by death, and the Inquisition may not pause to give you time to discuss the relations between the Imperium and the Mechanicus). Please refrain from using it as your personal chariot, and instead use it when a WAAAGH! descends, or a Hive Fleet, or something like that. Or trust it with the Guard, ya ain't a soldier man.

One of my Tech-Priests was an idiot and insulted the Emperor in front of a Chainsword-wielding fanatic, what do?
In the event one of your tech-priests is slain, you must do your best to discover the circumstances of their demise. Tech-priests are a rare and valuable commodity, and your brothers in faith. If the Tech-Priest was slain by a fanatic over a misunderstanding (Such as saying they do not worship the Emperor, or making a mistake over the governance of the Imperium), then call for that Fanatic's execution or servitorization. Should a tech-priest tell a Fanatic exactly how the Emperor can give him a fellatio, then give the fanatic a light slap on the wrist for removing such an imperfect and flawed cog in the machine.

The voices in my head want me to kill everyone!
In the event you're a filthy heretic, you have it pretty easy. You have full access to maintenance, atmospherics, the Vox, the power grid, and a tank. You can easily turn off Vox communications (Or sabotage them to turn cries for help into screams of devotion to the dark gods), pump all the energy possible into the grid and get to shocking doors, flood the atmosphere with Plasma, storm the brig with a chimera (A bad idea, seeing as they have a rocket launcher), or simply drag your target into maintenance. Or, you could just send an admin message claiming that you're an Inquisitor and your target is a filthy heretic (whatever you do, make it very convincing). Whatever fits your play style.