Williams, from Malahide, spent time at Home Farm before joining Drogheda, while he also has been on trial with Everton.
Shaun Williams claimed the 2010 Players Football Association of Ireland (PFAI) Young Player of the Year award as voted by his peers in the Airtricity League.
His accomplished season for Fingal, during which he represented the Ireland Under-23s and the Airtricity League against Manchester United, drew acclaim for his fellow players who chose him above a competitive field of nominees.
The captain of Sporting Fingal,the midfielder was the mainstay of Liam Buckley’s side which finished fourth in their first foray into the Premier Division to repeat their Europa League qualification feat of twelve months prior.
The Malahide native was the only player in the league to be nominated for both the Senior and Young player categories.
In February 2011, Williams started for Burnley Reserves vs Shrewsbury Reserves as a trialist in a side including first team players Marvin Bartley, David Edgar and Charlie Austin.
On 16th March 2011, it was announced that he had signed for MK Dons, who play in Football League One.