[@Xandrya]
Your character and mine are easy.  Sullivan has a problem with substance abuse and is considered pretty belligerent so he has to take weekly sessions with a councilor or psychologist.  That could be how our characters could develop which can move in certain directions if you wish to discuss. 


[@Heat]
Another easy tie.  As a fleeter, Sullivan had experience with cybernetics and robotics.  He meets all kinds of people and wouldnt have problems with a synth.  Hell, Sullivan would even be interested in his construction.

[@InfamousGuy101]
A little bit trickier for the engineer to be talking with military commander but everyone needs something fixed, and in a military environment, things need to get fixed alot.  It's possible they butt heads when it comes to procedure, but the two had similar life experiences, so maybe while they fight at work they'd have alot to talk about over a drink.