Chris Vrenna

Vrenna graduated from McDowell High School in Erie, Pennsylvania in 1985 and marched in the Erie Thunderbirds Drum and Bugle Corps. Vrenna then moved to Chicago, quickly becoming a part of the Chicago industrial music scene and was briefly a member of Die Warzau and Stabbing Westward.

He later reconnected with Trent Reznor, whom he met during high school in Pennsylvania, when they both were in local Cleveland, Ohio band the Exotic Birds. He also toured as a live drummer for KMFDM during the Money era tours, in 1992. He records under the name Tweaker, and has released four albums under that name: The Attraction to All Things Uncertain (2001), 2 a.m. Wakeup Call (2004), Call The Time Eternity (2012), and And Then There's Nothing (2013). Tweaker toured select North American dates with Skinny Puppy in 2004.

Vrenna won a Grammy award as a member of Nine Inch Nails for "Best Metal Performance" for "Happiness in Slavery" in 1995 for the live performance of the song on Woodstock '94.

Vrenna was Billy Corgan's programmer for four months in 1997. While he was on tour with the Smashing Pumpkins, Vrenna got a call from Axl Rose, who invited Vrenna to spend time with Guns N' Roses to work on what would become "Chinese Democracy". "I did for a couple weeks, but then decided I didn't want to join the band", said Vrenna. Vrenna stated in a later interview that he was in the band for several months before dropping out due to the required time commitment.

Vrenna has also worked on music for several video games, including Call of Duty: Advanced Warfare, Doom 3 (as producer with Clint Walsh), Quake 4, American McGee's Alice, its sequel Alice: Madness Returns, Enter the Matrix, Sonic The Hedgehog, Area 51, and Need for Speed: Most Wanted. In 2004, he started soundtrack work on Tabula Rasa, a massive multiplayer online game. He also helped compose the theme song to the animated series Xiaolin Showdown.

Vrenna was chosen to take over the drumming responsibilities for Marilyn Manson after Ginger Fish was injured in 2004 during the Lest We Forget tour. He then replaced Madonna Wayne Gacy as the permanent keyboardist for Marilyn Manson. Vrenna co-produced the albums The High End of Low (2009) and Born Villain (2012). In April 2011, following the departure of Marilyn Manson's drummer Ginger Fish, Chris Vrenna was announced to be his official replacement. However, in November 2011, it was announced that Vrenna had parted ways with the band in order to focus on scoring movies and video games.

In 2015, Vrenna composed the music on a series of downloadable content packs called Exo Zombies for Call of Duty: Advanced Warfare.

In 2017, it was announced by Vrenna's Facebook page that he would be composing music for the upcoming video game, Quake Champions, which marks his second collaboration with id Software since Doom 3.

In 2020 Vrenna was inducted into the Rock & Roll Hall of Fame alongside members of the Nine Inch Nails.