 On July 8, 2010 Kowalski was revealed as the new starting netminder for Nottingham Panthers in Great Britain's Elite Ice Hockey League.It was to be a historic season, as the Panthers won the challenge cup and playoffs.On March 28, 2011 it was announced that Kowalski had agreed to return to Nottingham and defend the double for a second season with the Nottingham Panthers in the 2011/12 Elite League campaign where he went on to lead Panthers to winning the Challenge Cup and the Playoffs once again.