Senior joined his hometown club last summer and made 31 league appearances at either left-back or left wing-back.
He joins Sam Johnson, Niall Maher, Tom Bradbury, Jay Benn, Dom Tear, Neill Byrne, Kian Spence, Luke Summerfield, Martin Woods, Kieran Green, Jake Hyde, Matty Stenson and Jamie Allen in Halifax’s first-team squad for the 2021-22 season.