Mark is a Life Member of Dromore RFC having previously played for Dublin University and NIFC. He has been a referee for 40 years and was on the National Panel from 1994 to 2004.
He is a Kings Counsel (NI), Senior Counsel (R of I) and Pro-Chancellor of Dublin University. He is the Referees Representative on the Ulster Branch Committee
He was elected to the IRFU Committee in July 2019.