that Matt Simon had signed with Sydney FC, reuniting with his former coach Graham Arnold after he penned a one-year deal with the club. Arnold said the capture of Simon would add a new dimension to his squad. In Round 4 of the 2015–16 A-League, Simon scored twice as they beat his old club 3–1, after coming on as a substitute. On 20 July 2016, Simon signed a one-year extension to his contract. Despite coming off the bench for all of his 25 league games of the 2016–2017 season, Simon signed a one-year contract extension with the Sky Blue until the end of the 2017–2018 season. Simon was part of the title winning squad, winning the double in 2016–17. On 24 March 2018, Simon came off the bench for Sydney FC in a match against his former club, and scored the winning goal in 90+3, which ultimately would set Sydney FC up to winning the A-League Premiership for the 2017–2018 season. Second return to Central Coast Mariners On 10 May 2018, Simon left Sydney FC and signed once again with the Central Coast Mariners, on a two-year contract. On 26 October 2018, he was announced as the Mariners new club captain. On 3 October 2022, Simon announced his retirement from football, following a neck injury sustained in the 2021 FFA Cup, which had ruled him out of the entire 2021–22 A-League Men season. International career Simon played frequently for Australia under-23 (the Olyroos) in 2008. In May of that year he scored a hat-trick for the side in a 3–1 win over Republic of Ireland in Malaysia. Simon was originally named as an alternate player for the Olyroos at the 2008 Olympic Games in China. However, when Archie Thompson was injured mid-tournament, Simon was added to the playing squad. He played as a second-half substitute in the team's final match, a loss to Ivory Coast. In May 2008, following strong form for the Olyroos, Simon was called up by Pim Verbeek to the Australian senior side for the first time for a 2010 World Cup qualifier against Iraq. He eventually made his Socceroos debut in January 2009 in a 2011 Asian Cup qualifier against Indonesia in Jakarta, in an Australian team of primarily A-League players. The game finished as a scoreless draw, although Simon did have a goal ruled out for offside. He made a second appearance for Australia in