Simon played his junior football on the Central Coast and joined the Mariners in the lead-up to 2006-2007 from the now defunct representative team Central Coast Lightning.
Since making his debut in 2006, Simon featured 148 times in the A-League and found the back of the net on 41 occasions making him the all-time leading scorer for the yellow and navy.
A role model for grassroots footballers all over Australia, Simon's incredible passion, determination and hunger for goals earned him two Socceroos caps and an appearance at the 2008 Beijing Olympic Games under then Olyroos coach Graham Arnold.
Simon's career spans eight seasons across the A-League, which was broken up by a short stint in the K-League Classic with Jeonnam Dragons in 2012.
Simon has thanked the fans and members for their support during his career.
"The fans have been a huge part of why I always had plans to finish my career with this club. Unfortunately that won't be," Simon said.
"The club told me that I won't fit into their plans for moving ahead next season."
The Mariners said they wish Simon all the best with his career in football and he will continue training with the Mariners until the completion of his contract in May.
