Career
Irmen was drafted 78th overall by the Minnesota Wild in the 2003 National Hockey League Entry Draft. Irmen was drafted after playing two seasons in the United States Hockey League with the Lincoln Stars He played collegiate hockey with the University of Minnesota in the Western Collegiate Hockey Association. At the conclusion of his senior year, the Minnesota native made his professional debut with the Wild"s American Hockey League affiliate, the Houston Aeros at the tail end of the 2005-2006 season.
After signing an entry-level contract with the Minnesota Wild, Irmen was reassigned to the Aeros on a full-time basis.
Irmen made his long awaited National Hockey League debut in his fifth year within the Wild organization, appearing in two games in the 2009-2010 season. As a free agent from the Wild, Irmen decided to pursue a European career, signing with Italian club, The Human Context Bolzano of then the Serie A on October 12, 2010.
Irmen followed with stints in Austria and Switzerland before signing a one-year contract with German club, European Research Council Ingolstadt of the DEL on May 26, 2015.