The 2013 season saw the appointment of Branko Culina as head coach, along with Ivan Petkovic as his assistant. The 2013 season has been the most successful season since promotion into the NSW Premier League, with the Rockdale City Suns finishing 4th in the regular season, beating Marconi Stallions, Sutherland Sharks and Sydney United on the road to the Grand Final, before going down to eventual winner, Bonnyrigg White Eagles, 1–0 in front of nearly 6,000 people at Penrith (Centrebet) Stadium.