Career
Glöckner, from what was then East Germany, had a long international career, officiating at the 1964 Summer Olympics in Tokyo and also matches in the 1976 European Championship. He attracted considerable criticism for his part in the games between ADO Den Haag and West Ham United in the 1976 European Cup Winners Cup and Wales and Yugoslavia at Ninian Park, Cardiff, in which the Welsh were eliminated in the quarter-final. Glockner had to be escorted from the field of play.
In total he refereed at four Olympic Games and two World Cups.