In his career, he has edited episodes of Ally McBeal, Robbery Homicide Division, Karen Sisco, Kidnapped, Shark, The Beast and Entourage.
[1] In 2001, Johnson won a Primetime Emmy Award for editing The West Wing episode "Two Cathedrals".
He was also nominated the year before, for editing the episode "In Excelsis Deo".
[2] His film editing credits include The Manhattan Project (1986), Something Wild (1986), Married to the Mob (1988) and Miami Blues (1990).
As a head editor, he worked on the films Mystery Science Theater 3000: The Movie (1996), Infinity (1996) starring Matthew Broderick (the film was also Broderick's directorial debut), and Cruel Intentions 2 (2000).