Jeff Klaven was born in the United States in 1953. He played with Cobra (a Swiss/American band from Memphis - some members were Swiss) from 1982 to 1983. Cobra had one album release called "First Strike".

After that, he went with "Krokus" (a Swiss Heavy Metal band) from 1983 to 1986 and played on three albums - "The Blitz", "Change Of Address" and the follow-up "live" album "Alive And Screaming" in the same year. He replaced Steve Pace who had replaced Freddy Steady.

After Krokus, he played with "Royal Jelly" who also only made one album called "It Was Now Is" whatever that means.

The is Jeff playing "Midnight Maniac" with Krokus on the music video from the album "The Blitz" . It has an tricky intrduction.