Early on in the show, they had not yet established their supporting cast. In the pilot, four office workers are seen that are never seen or heard from again. It is possible they were fired, went to work at a different branch, or left after hearing rumors of downsizing.
The male employee is played by Mike McCaul, while the red-haired female is played by Henriette Mantel, and the other two females' names are unknown. In the DVD commentary, Rainn Wilson says that two of these women were the real-world accountants on the show.
The red-haired female was seated at Meredith Palmer's desk before Meredith was introduced to the show; she also appeared in the last scene of "Hot Girl", going to a filing cabinet, though she was in the same clothing as the pilot, clearly revealing the scene as a flashback - image.