These characters had varying levels of participation and speaking roles throughout the series. Most active were Baines (Rockmond Dunbar) Black male; Magus (Marcia Magus) Caucasian female; and Walman (Walter Norman. Walman's name seems to be a combination of the actor's first and last names! They probably got to pick, or something...) Male Caucasian.
The rest of the Ops crew we see tooling about and perhaps talking only once or twice (if that) :
Cameron (Kirk Trutner) - Large Caucasian guy. Bearded.
Denner (Danielle Fisher) - Petite Black female.
Mazatl (Frederick Lopez) - Name would seem to suggest a Hispanic origin, but Mazatl has been thought to be either that or Native Indian. [This cast info from Wikipedia entry on Earth 2 cast]
Eben (Erin Murphy) - Caucasian female. [This cast info from IMDb]