In 2002, Jørn finally joined the global metal scene fronting the melodic power metal band Masterplan, formed with Roland Grapow and Uli Kusch after both were fired from Helloween. Jørn released two successful albums with Masterplan, playing at big festivals and tours around the world from 2003 to 2006 until he left the band on 11 May 2006, because of creative differences. Jørn wanted to take the band towards a more melodic style, while the other members were leaning towards a heavier sound. During the time as member of Masterplan, Jorn also released two solo albums via the band's record label AFM Records: "Out to Every Nation" in 2004 and "The Duke" in 2006. After his departure from Masterplan, Jørn concentrated more on his solo career and started a longtime partnership with the record company Frontiers Records.