Running three businesses and studying for his MBA for CEO’s in Sporting Organisations, Williams will join Grantham Down in the Premier Division as a director.
"I’m very honoured to be joining the board of Grantham," he told the club's official website.
"A club with tremendous heritage and history and look forward to helping shape and build the future - an exciting one for all’.
Gingerbreads Chairman Nigel Wedgwood added "I'm really pleased to have Dean coming on board.
"From first meeting him he's shown a passion to get behind the club. I'm looking forward to how we can work together to build what we've already started. We both enjoyed Saturday's FA Trophy win together"
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