Diarmuid is a fellow of Chartered Accountants Ireland and the Institute of Certified Public Accountant in Ireland.

With Chartered Accountants Ireland (CAI) he holds qualifications in Insolvency & Corporate Restructuring and in Forensic Accounting

Diarmuid began his career with Collins O’Brien in 1988. He has worked at all the various levels and capacities from Book Keeper to Accountant to Office Manager to Director of Collins O’Brien in July 2016.

He has been strategically involved in some of the firm’s major business transitions in relation to practice purchases etc.

As well as his office managerial duties, Diarmuid’s primary responsibility with the firm is the management of a large portfolio of clients involved across all business sectors.