In the early 1970s, Rubach joined the heavy metal band Accept, first on keyboards, later on bass until he left in 1978 and was succeeded by Peter Baltes.
Rumors and pictures say that 3 other Accept members (Jörg Fischer, Stefan Kaufmann and Hansi Heitzer) also played with Bad Steve.
They also did a tour with Guns N' Roses, Zodiac Mindwarp and Lita Ford (where he met his old friend Martin Gerschwitz again) before he left the band in 1989.
[3] Rubach continued to work as a session musician and arranger for famous German acts like Anne Haigis and Nino de Angelo.
As an audio engineer he worked for many artists like Scorpions, Elton John, Bonnie Tyler, Whitney Houston, Lionel Richie, Joe Cocker, Luciano Pavarotti, Iggy Pop, Pet Shop Boys, Chris de Burgh, Chris Rea, Art Garfunkel, Muddy Waters, Paul Young, Kelly Family, Electric Light Orchestra, Ace of Base, Miguel Rios, Billy Cobham, Helge Schneider, Rednex, Milva, Tato Gomez, Karel Gott, The United Jazz and Rock Ensemble, Supermax, Leningrad Cowboys, Angelika Milster, Baden Powell de Aquino, Grobschnitt, Tarkan, Beverly Craven, Andre Heller, Vaya Con Dios, Eleni Tzoka and for the musicals Jesus Christ Superstar, Cabaret, The Magic Flute and The Jungle Book.