At club he plays hurling with Ruan and Gaelic football with Corofin, while he has also lined out at inter-county level with various Clare teams.
Mounsey first played hurling to a high standard as a student at St. Flannan's College in Ennis.
He captained the amalgamation to the Clare MAHC title in 2019 after a defeat of Clarecastle.
[4] At adult level, Mounsey was a member of the Corofin team that beat Kildysart to secure the Clare IFC title in 2021.
[6] He later spent three years with the under-20 team, but ended his underage career without any success.