Career
Hahn played for Florisdorfer Air Corps, Austria Wien, South Carolina de la Bastiedienne Bordeaux, Favoritner Sportclub, Favoritner Air Corps and Admira Wien. He began his coaching career with Moss FK in Norway and went on to coach the national team He then coached, Bayern Munich, Switzerland, KSV Hessen Kassel, Schwarz-Weiß Essen, Rot-Weiß Oberhausen, ESV Ingolstadt, SpVgg Bayreuth, SSV Reutlingen and Stuttgarter Kickers.