Ben Williams will be refereeing in his 100th game in the Hyundai A-League this weekend when Central Coast Mariners host Adelaide United at Bluetongue Stadium.

The milestone is one of note for Williams, who has spent the better part of his career officiating in the A-League.

Williams debuted in the Hyundai A-League in Round 1, August 26, 2005 and to date has had an esteemed career as a Hyundai A-League, AFC and FIFA referee.

Some of his career highlights have included officiating in the AFC Champions league in 2007 and 2008 as well as officiating at the 2010 FIFA Club World Cup and 2011 Asian Cup.