 His best team finish was third in Villach on 9 December 2001.In the FIS Nordic World Ski Championships, Mateja's best finishes were fifth in the large hill individual event in Trondheim (1997) and fifth again in the large hill team event in Sapporo (2007).His best finishes at the Winter Olympics were fifth in the large hill team event (2006) and 20th in the large hill individual event (1998).