Mitja Prezelj is a concert promoter since 1986. He organizes shows of international and local artists in venues and clubs with a capacity of 1,000 to 12,000 visitors and larger events for various companies (event marketing). Past concerts: Magnifico in Arena Stožice, Green Day, Alice Cooper, Billy Idol, Asian Dub Foundation, Slash, Bryan Adams, Gotan Project, Manu Chao, Il Divo, Faith No More… Among the major events, he organized for companies: X.plosion of Fun in Kranjska Gora as an accompanying event of World Cup competitions in Vitranc, slalom of legends Ski Challenge also in Kranjska Gora, Gong of popularity in Bled, etc. He is also a co-founder of the Economic Interest Association of Concert Organizers of Slovenia (GIZ KOS). GIZ KOS is a representative organization of Slovenian promoters which was established in 2009.