Williamson, 26, made 34 appearances for the Gingerbreads last season, scoring once in a 4-1 defeat away to South Shields.
The defender boasts a wealth of experience in the Northern Premier League, having played at Tadcaster Albion, Bridlington Town, Matlock Town and Scarborough Athletic.
A strong and athletic defender, Cleethorpes will hope that their new addition can reinforce their defensive structure for the the 2022/23 season.
Photo credit: Cleethorpes Town
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