Sheridan made his debut on the inter-county scene when he was picked for the Mayo under-21 team. He won back-to-back Connacht medals in this grade, however, an All-Ireland medal remained elusive. Sheridan made his senior debut during the 1995 championship. He was a regular on the starting fifteen over much of the next decade and won three Connacht medals and one National Football League medal. He was an All-Ireland runner-up on two occasions.[citation needed]
Management
Sheridan oversaw NUI Galway to the final of the 2018 Sigerson Cup. In January 2021, Sheridan was appointed manager of the Mayo under-20 county team.[2]