Mark was elected to the Council of CPA Ireland in April 2016 and served as President of CPA Ireland 2023-2024.

Mark graduated in Accounting & Finance from Dublin Business School in 1995. A CPA since 1999, he has spent over 20 years in practice and is currently a Partner in Niall Byrne & Company. The practice has been in existence since 1984 and carries out all aspects of general practice work.

He has also represented CPA Ireland on the CCAB-I Business Law committee since September 2007.