On Black Sabbath's Heaven and Hell tour in 1980 (on which Shakin' Street were the support act), Friedman was introduced to bass player Joey DeMaio by Ronnie James Dio.

He also recorded an instrumental album with Dictators drummer JP Thunderbolt Patterson, called "Thunderboss" In July 2005, Friedman joined Manowar onstage at the Earthshaker Festival; performing "Metal Daze" and "Dark Avenger" with them.

In October 2006, Friedman and The Dictators played Friday and Saturday nights of the closing weekend at punk rock venue CBGBs, one of the clubs where they got their start.

2007 started off with an eleven city tour of Spain with JP Patterson and their Spanish super-band "The Thunderbolts" which also includes members of Bummer and Sex Museum.

Friedman's 2008 included an appearance with Manitoba's Wild Kingdom at the 2008 Joey Ramone Birthday Bash, performances with Shakin' Street at the Sweden Rock Festival, and a few tour dates in Spain with The Dictators.

[7] In May 2011, Friedman was a special guest at the 11th Annual Joey Ramone Birthday Bash in New York city, performing, among other songs, "Stop Thinking About It" with fellow Dictator Andy Shernoff.

In early 2012, vocalist Sean Peck of Cage, guitarists Friedman and Stu Marshall, bassist Mike Davis and drummer Rhino formed a metal supergroup, Death Dealer.

He brought down the house[citation needed] as the surprise guest star at the 2016 Keep It True Festival with a new all-Manowar-songs "Ross The Boss Band" that hails from his hometown of New York City.

The band includes bass player Kevin Bolembach, his nephew Lance Barnewold on drums, and singer Mike Cotoia of Fate Breaks Dawn who has a six octave range.