In 1978, Jacob formed the band Rising Force together with guitarist
Yngwie Malmsteen. Three years later Jacob joined the band Force, which later changed its name to
Europe, replacing
John Levén, who took Jacob's place in Rising Force. During his time in Force, Jacob wrote the song "Black Journey Through My Soul" together with vocalist
Joey Tempest. The song was eventually included on Europe's second album
Wings of Tomorrow, retitled "Scream of Anger". After spending three months in Force, Jacob traded places with John Levén again, who apparently had issues with Malmsteen. In 1985, Jacob returned to Malmsteen's band to play on the album
Marching Out and parts of the following US tour. He left the band in November 1985 due to issues with Yngwie's management and in 1986 he toured with jazz-rock band Wasa Express. In 1987, Jacob played on the album
Total Control, the first solo album released by Europe guitarist
John Norum. Jacob also re-used demo tracks from his pre-Yngwie band Power for several of the songs included on that album, including the Swedish hit single "Let Me Love You". Two years later he formed the band
Talisman together with vocalist
Jeff Scott Soto. Throughout the years Talisman was Jacob's major effort and the band released several studio and live albums until 2007. In 1989 Jacob was back in the USA, auditioned for
Dio and played on Jeff Scott Soto's other band
Eyes's debut. In 1992, Jacob played on a song with Lion's Share, "Nothing's Free", which was included on a Belgian compilation and in 1993 he was guest musician on ex-
Candlemass singer Thomas Vikström's solo album
If I Could Fly. Vikström and Jacob had played together with guitar player
Tommy Denander (
Paul Stanley,
Alice Cooper) and drummer Jake Samuel (
The Poodles) in the cover band Horny Strings and Vikström also was a touring member of Talisman along with
Jason Bieler from
Saigon Kick. Later Vikström (
Therion) took the lead singer role. The same year Jacob was guest musician on the album
Something Wicked Comes by Billionaires Boys Club, a band featuring ex-
Accept guitarist
Jörg Fischer and Jacob's former Yngwie Malmsteen bandmates
Mark Boals and
Anders Johansson. In 1994, he played on The Johansson Brothers' self-titled album. Another band Jacob formed was
Human Clay, together with Jeff Scott Soto. They recorded two albums. In 1996, Jacob played on
Inspiration, a cover album recorded by Yngwie J. Malmsteen. In the early 2000s, Jacob studied psychology at
Stockholm University for a few years. In 2005, Jacob was one of three new players to participate in the Swedish/German hard rock band
Last Autumn's Dream, for its second studio album, along with drummer
Jamie Borger and keyboarder Thomas Lassar. They were hired to replace John Levén,
Ian Haugland and
Mic Michaeli, who played on the debut album, but who could not make it this time due to taking part in the Europe reunion. Jacob also recorded with Last Autumn's Dream for five further studio albums, the latest being
Dreamcatcher, which was released on 26 January 2009. Jacob made his last appearance on record with the Swedish studio band Impulsia, on the album
Expressions which was released on 24 September 2009 via Impulsia Music and under Riverside Records. It has been reported that Jacob's birth name was
Marcus Jacobsson, something he dismissed in an interview. ==Death==