He was a member of Offaly County Council for the Tullamore local electoral area from 2017 to 2024. Formerly President of the Tullamore Chamber of Commerce, McCormack had been a member of Tullamore Town Council before its abolition in 2014, and was co-opted to the Council in 2017 to fill the casual vacancy from the retirement of Sinead Dooley who became CEO of Irish Rural Link. He retained his seat in each of 2019 and 2024.[3]
He was elected Cathaoirleach of Offaly County Council after the 2024 Local Elections and also served on EMRA.
For the past number of years he has run a printing business in the town of Tullamore.[4]