I'm hoping both the squad and crew are multi-species.
Hanar chef?
Batarian comm specialist?
Rachni scientist?
Geth engineer?
Elcor psychologist?
Volus requisitions officer?
Let's go hog wild! I'd love a multi-species team comprised of pretty much every species possible. Plus, although species like elcor or hanar aren't ideal of a ground team, they can still be useful crew members. The volus have a bombing fleet, right? They must be doing something right with ships.
Hanar chef = only cook diet prothean food (everyone goes mutinery)
Batarian comm specialist = accused of sending intel during lunch break (everyone want to kill the only and last batarian)
Rachni scientist = everytime someone has an owie they say 'I sat next to the rachni....so maybe....?' (everyone want to squash the bug)
Get engineer = everything is double checked and none want to play chess with the geth (everyone keep doing overtime to check for illegal hacking )
Elcore psychologist = his slow speech doesn't help with field trauma (everyone want a replacement)
Volus requisitions officer = his price are too high and is accused of selling the best piece when none is looking (everyone asking for a holding cell)
sorry just kidding!