He is mentioned as being the bass player in a very early Agnostic Front as well as Cro-Mags line-up, alongside Harley Flanagan on drums, Parris Mayhew on guitar, and Eric Casanova on vocals.
He was with D Generation from 1996 to 1998 and recorded on their album Through The Darkness, and Youth co-wrote the track "Sunday Secret Saints" with Jesse Malin.
Chrome Locust was formed by Youth, D Generation drummer Michael Wildwood, and Vásquez bassist Jim Heneghan in 1998.
Youth disbanded Chrome Locust in order to audition for Danzig, despite having a potential offer to tour with The Hellacopters.
[6][7] This featured Davey Havok on vocals and on their album Songs from the Earth with guest appearances from Glenn Danzig.
The band undertook a short UK tour with horror punk artist Wednesday 13,[9] in support of the release.
During an interview, Youth recalled Nielsen calling him a member of the New Jersey Dolls, as a reference to his former band, D Generation.
In January 2010 Youth was announced as the second guitarist with Michael Monroe during a press conference held in Los Angeles.
Youth's tenure with Michael Monroe was cut short due to issues with band management as well as an offer to audition and tour with his childhood hero, Ace Frehley.
In 2010, the first single "American Dream" was released on One Voice by Capricorn, a band formed by Youth, Phil Caivano (of Monster Magnet) and Karl Rosqvist (of The Chelsea Smiles and Michael Monroe).
Along with Youth, the band also featured vocalist John Joseph (Cro-Mags), Nick Oliveri (Dwarves) and Joey Castillo (Danzig).
A hardcore punk band that features Israel Joseph I (formerly of Bad Brains), Nick Townsend (currently/formerly of Deadbeat, Knife Fight), and Todd Jones (currently/formerly of Nails, Terror).
On October 1, 2017, Youth held a tribute to his former Warzone bandmate, Raymond Barbieri AKA Raybeez, on the 20th anniversary of his death, at Tompkins Square Park in NYC.
The memorials featured musicians and friends from the hardcore scene and bands he had worked with, playing and speaking in his honor.
[14] Some of Youth's ashes were placed at the Hare Krishna Tree in Tompkins Square Park on the night of the New York memorial.