quick list of Role's as i see them, if you come up with more i'll add them to the list:
Captain- a leader for the crew and probably the guy who steers the boat either and is the primary or secondary person for that Job.
Pilot- guy who drives the boat, not vital but does have an effect on the captain's job requirements.
Engineer/Mechanic- keeps the boat going.
Medical- not vital but i'm sure we would have run into some broken bones and snake bites so not a bad idea either.
Mercenary- combat exceptional-ism. Security for when were screwed. Everybody should be combat capable though.
Scout- Stealthy person who gets intel and 'procures' items for us without other people's knowledge.
Face- Deals with delicate situations without resorting to violence or burglary.