 Ademeno was out of contract as of the end of the 2009–10 season.On 30 June 2010, Ademeno signed a two-year contract with Crawley's Conference National rivals Grimsby Town.Suffering an early injury setback in his first few months with Grimsby it wasn't until 3 January 2011 that Ademeno finally got off the mark with his new club, scoring twice in a 6–1 away win over Histon.