Career
He refereed one match in the 1992 Union of European Football Associations European Football Championship in Sweden that was between France and Denmark. Forstinger served as a referee during the 1989 Fédération internationale de football association World Youth Championship in Saudi Arabia as well as 1990 and 1994 World Cup qualifiers. He is known to have officiated Fédération internationale de football association matches during the period from 1987 to 1992.