Daniel Young

Daniel Young was a worker in Mars City who operated a crane in Mars City Underground. He was cynical about his job, which he found very boring. He passed the time by reading his PDA while he worked and talking to nearby coworkers. He was much friendlier than other denizens of Mars City to new people. Shortly before the Demons from Hell invaded, Daniel was offered a promotion. He probably would have accepted it, had the demon attack not come. After the demon invasion, when Doomguy passes through the area where he last saw Young, no body can be found but the floor is caked in blood, which is almost certianly Young's.

Trivia
It is possible to shoot Young and pick up his PDA to read an e-mail about his possible promotion.