Career
Born in, County, Hennessy first excelled at hurling during his schooling at Ardscoil Ríson He arrived on the inter-county scene at the age of sixteen when he first linked up with the minor team, before later joining the under-21 and intermediate sides. He joined the senior panel during the 2014 season.
At club level Hennessy is a one-time Munster medallist with.