Film:
* The Exorcist III (1990): Played Detective Kinderman (a recurring role he also played in the TV series "The Exorcist")
* The Lost Boys (1987): Played the role of Max, the vampire biker leader
* Fast Times at Ridgemont High (1982): Played Brad Hamilton's dad
* The Big Lebowski (1998): Played "The Stranger" in a small but memorable role
* The Rocketeer (1991): Played "The Fat Man"
* The Princess Bride (1987): Played the role of the "Giant"
* True Romance (1993): Played "The Cop"
* Beverly Hills Cop II (1987): Played "The Cop"
* Star Trek: Generations (1994): Played "The Starfleet Security Chief"
Television:
* The Exorcist (TV series, 2016-2018): Played Detective Kinderman
* Walker, Texas Ranger (1993-2001): Played a recurring role as "Cletus"
* ER (1994-2009): Appeared in several episodes as various characters
* The X-Files (1993-2018): Appeared in several episodes as various characters
* The Twilight Zone (1985-1989): Appeared in several episodes as various characters
* The Adventures of Brisco County, Jr. (1993-1994): Appeared in several episodes as various characters
* Miami Vice (1984-1989): Appeared in several episodes as various characters
* Knight Rider (1982-1986): Appeared in several episodes as various characters
* Hill Street Blues (1981-1987): Appeared in several episodes as various characters
This list only scratches the surface of his work. He has a long and varied career, often playing tough, gruff, or menacing characters. He is a recognizable face in many classic films and television shows. To learn more about his career, you can search online for "John Dierkes filmography."