[1] He joined Minor Threat as bass guitarist in August 1982 when original bassist Brian Baker, Hansgen's childhood friend,[1] switched to second guitar.
He left Minor Threat in 1983 when its founding members decided to return the band to its original configuration,[2] a few months before their breakup.
In 2003, Baker and Hansgen began playing in the side project Middle Aged Brigade, with whom they recorded some demos.
In 2009, Steve Hansgen joined Mike Dolfi, Boyd Farrell (both from Black Market Baby) and Phil Ricche (of The Intentions) in the band Rustbuckit.
[citation needed] On 29 December 2012, Hansgen reunited with three original members of the seminal DC hardcore band Youth Brigade, vocalist Nathan Strejcek (formerly of seminal band Teen Idles), drummer Danny Ingram and bassist Bert Quieroz for a show at the Washington, D.C. club The Black Cat.