Pam from Archer and Jillian from Workaholics are essentially the same character. They're both sort of a saucy, fat chick who can throw down when necessary. I even thought that Pam might be voiced by the actress who plays Jillian, but I was wrong. But seriously, same bitch is same.
Jillian from Workaholics is played by Jillian Bell, who I guess Workaholics is the only thing she has done, since she doesn't have a wiki.
Pam from Archer is voiced by a woman named Amber Nash who has done voices for Frisky Dingo, ATHF, and a few other projects.