However after holding talks with Town, his relationship with Russell Slade is likely to give Town the advantage.
Slade was youth team coach at Notts County when Slade was in charge, Simpson still speaks highly of his former mentor.
"I know him well. Grimsby are an ambitious club. It wasn't long ago they were in the first division and I think it could be a good move for me," Simpson told the Bucks Free Press.