Kellam also worked for The Post Group as editor and compositor on the television series Mission: Impossible (1988-1990) and Freddy's Nightmares (1988-1990) as well as several television specials including Laser Optics II (1989), MTV's 10th Anniversary Special (1991), Chez Whoopi (1991), and Eagles: Hell Freezes Over (1994) for which he received a Primetime Emmy Award nomination in the category Outstanding Individual Achievement in Editing for a Miniseries or a Special – Multi-Camera Production in 1995.