 He is also a former member of Lemmy Kilmister's (Motörhead) side project The Head Cat (with Stray Cats' Slim Jim Phantom on drums).As a bandleader, Stijepovic fronts the rockabilly band Atomic Sunset and performs as a solo artist under his own name.He has also recorded and performed as a guest musician with Tommy Emmanuel, Marco Beltrami, Wanda Jackson, Molotov, Rachel Brice and Beats Antique among others.