Gene Hoglan

In 1983, Hoglan began his music career as a roadie (lighting engineer) for the thrash metal band Slayer, where he also played the drums during concert soundchecks. He also did backing vocals on the song "Evil Has No Boundaries", from the first Slayer album Show No Mercy. He contributed in the recording of Haunting the Chapel, holding Dave Lombardo's drum kit together while recording "Chemical Warfare" because there was no carpet in the studio, said drum kit including a china cymbal owned by Hoglan. He became an influence in Lombardo's drumming style and speed. Lombardo had just had the double bass added to his kit and it was the first double bass Hoglan ever played. Lombardo was impressed with Hoglan's playing, and Hoglan gave Lombardo tips regarding the use of the double kick drum.

In 1984, Hoglan was part of the band War God with Michelle Meldrum. At the end of the same year he was asked to join the thrash metal band Dark Angel as the drummer. He penned most of the lyrics for Dark Angel's next three albums. He achieved greater fame during the mid-1990s playing with Death, at the same time that bandleader Chuck Schuldiner was taking that group into a more progressive style. Subsequently, he recorded one album with the thrash metal band Testament, and made the acquaintance of Canadian multi-instrumentalist Devin Townsend, forging a lasting friendship. He has since recorded several albums with Townsend, both as part of the speed/industrial/death metal band Strapping Young Lad and under Devin Townsend's name.

Other bands have also recruited Hoglan as a session drummer. He has recorded albums with the Norwegian black metal band Old Man's Child and the Danish death metal band Daemon. Additionally he has done production and engineering work for other albums and demos. Hoglan also was recruited by Vancouver thrash metal band The Almighty Punchdrunk, and appeared as a band member for their only album to date, Music for Them Asses, released in 2001.

In 2005, Hoglan stood in for Lopez for the majority of the Sounds of the Underground tour when Lopez began having more panic attacks. Hoglan played double duty by playing a set with Strapping Young Lad then performing with Opeth later in the evening. It was later announced Lopez had a rare blood disorder and was seeking treatment. Hoglan also appeared in Opeth's music video "The Grand Conjuration" as they filmed it on the tour while in Los Angeles, California.

Hoglan was also part of thrash metal band Tenet, a side project of Strapping Young Lad guitarist Jed Simon, from 2003 to 2007. Hoglan left the band on amicable terms in January 2007. He was replaced by Adrian Erlandsson only to return to the group in June of the same year. Hoglan recorded his drum parts for the entirety of the following album in a mere two days.

Hoglan is working with Dethklok, the band from the animated TV show Metalocalypse. The show was co-created by stand-up comedian/actor/musician Brendon Small, who also composes or performs all of the music. Hoglan features in Dethklok's debut album, The Dethalbum, which was released on September 25, 2007. He toured with Brendon Small and the live band during the summer of 2008. Besides working with Dethklok, Hoglan is also a guest star by voicing a health inspector in one episode of the series. He later performed on Dethalbum II, the sequel album released on September 29, 2009, and again toured with Dethklok. The two later collaborated to make Brendon Small's Galaktikon using extra studio time from the Dethklok studio sessions.

Hoglan played drums on Zimmers Hole's third studio album When You Were Shouting at the Devil...We Were in League With Satan in 2008.

In June 2011, he reunited with Testament, to record their tenth studio album Dark Roots of Earth. On that album, he filled in for Paul Bostaph, who was unable to participate in the recording sessions because of a "serious injury". In 2012, he began touring with Testament, and on January 27 filled in for Charlie Benante of Anthrax. Gene was the drummer for Fear Factory from 2009 to 2012 and played on their release Mechanize; his association with the band ended when he was "no longer needed", and he expressed both a reluctance to join and a disappointment in the ultimate resolution of his tenure. He also participated in the recording sessions of Viking's reunion album, No Child Left Behind (2015).

In October 2013, it was announced that Hoglan would be participating in the reunion of Dark Angel, who still play live occasionally to this day. The band is also planning to release a new album in the future.

In 2017, Hoglan released an art collection consisting of long-exposure photography of him playing with colorful glowing drumsticks, resulting in psychedelic imagery.