 He left the band in 2002 to join the new supergroup formed in by former Helloween members Roland Grapow and Uli Kusch, with Norwegian vocalist Jørn Lande (former member of bands Ark and Beyond Twilight), called Masterplan.Jan used to do the main backing vocals for Masterplan during live performances.Jan performed with German heavy metal band Running Wild for their farewell show at Wacken Open Air on 30 July 2009.