Star Trek EVA crew

I really wanted to add a human element to my Star Trek renders, with Poser I exported posed character and using my old EVA helmet and life-support pack I finally finish. around 30 characters and last touch was a Phaser and low poly Tricorder.
my earliest idea was colour code for each branch
White is standard ship issue.
Orange and Gold is security
Green and White is Medical
Orange is Engineering / Construction seen at starbases and docks