retainer

butler, footman, groom, houseboy, houseman, majordomo, man, manservant, servitor, valet

handmaiden (also handmaid), housekeeper, housemaid, lady-in-waiting, maid, maidservant, wench, woman

assistant, attendant, companion, factotum, follower

dogsbody [chiefly British], drudge, gofer (or gopher)

assistant, cog, flunky (also flunkey), subordinate, underling, yes-man

drudge, gandy dancer, grub, hack, jobber, laborer, navvy [chiefly British], toiler

nine-to-fiver, wage earner, wage slave, wageworker, workingman, workingwoman, workman, workwoman

associate, colleague, coworker

temp, temporary