On 9 August 2011 it was announced he had signed a contract to be goalkeeping coach at A-League club Sydney FC. Despite the dismissal of Frank Farina at the conclusion of the 2013–14 season, Kalac chose to remain at the club, working under new manager Graham Arnold. At the end of the 2014–15 season, with one year remaining on his contract, it was announced that he would be leaving Sydney FC, eventually being replaced by one of Arnold's closest coachesJohn Crawley.