Toby Flenderson is The Office's mild-mannered human resources director. There's not much else to him, is there? Not unless you count playing writer, producer and showrunner on the NBC series. Paul Lieberstein, the actor who portrays the meek, mumbling Toby, has run The Office since Greg Daniels left after Season 4 to take on Parks and Recreation. But now, Lieberstein is stepping down from the position to take on his own new project.