Charles Alexander Clouser (born June 28, 1963) is an American keyboardist, composer, record producer, and remixer.

He worked with Trent Reznor for Nine Inch Nails from 1994 to 2000, and is a composer for film and television; among his credits are the score for the Saw franchise and American Horror Story.

Clouser has remixed artists such as Nine Inch Nails, Marilyn Manson, White Zombie, Rammstein and Meat Beat Manifesto.

The first release from the collaboration, known as "Throwing Punches", appeared on a soundtrack in 2003 for the film Underworld, and was credited as a Hamilton track.

Clouser created one of FirstCom music's master series discs, only sold for commercial use, in the late 1990s.

In 2001, Clouser formed the supergroup Revenge of the Triads with Jason Slater and Troy Van Leeuwen, although they later disbanded in 2002 without releasing any material.

"[6] He has also scored films such as Deepwater (2005), Dead Silence (2007), Death Sentence (2007), and Resident Evil: Extinction (2007).