Employers hire people they believe are competent and can be trusted. Either they get that feeling during a formal interview or someone they trust vouches for the new guy. That's how it works in the real world, that's how it will work in any human centric society millions of years from now.
So if you have a Patron who needs 3 people to do a job, the only intro you need is what you find in Reservoir Dogs; so-and-so, knows so-and-so, who knows so-and-so, which is why you are now sitting around drinking coffee and talking about the earning power of waitresses relative to the work they perform. Screw up this job and you'll have a hard time getting more work.
This works for any SOC 1-15 characters. “Good chap that Shuguli, I think you’ll find him quite up to the task your Grace.” Say it in a British accent if it makes you feel better.
Toss amnesia, low berth failure, and all that crap out the window. It’s trite, contrived, and shows players that in your world, magical things happen (thus you should really be running a D&D game), and that you are unconstrained by logic, common sense, or realism.
Occam ’s razor should rule. What’s more likely, uber-patron hire six people to do a job then uses some TL-15 device to blank their memory while leaving them in some precarious state from which they will be able to escape?
Or would he/she hire six people to do a job, then use a few thugs with TL-6 guns to kill them all afterward.
Don’t go cheap on the intro. It cheapens the whole game.
My 2 Cr.