 In 2018 he was elected to the Council of Dublin Chamber of Commerce.Barrister-at-Law
Fellow of the Institute of Chartered Accountants in Ireland
Previously a member of the Irish Tax Institute

Diarmuid Hegarty founded Griffith College as the "Business and Accounting Training College" in 1974 and the college operated from Milltown, St. Stephen's Green and Morehampton Road, Dublin,
The name was changed to Griffith College when the college moved to the former Griffith Barracks in 1991.As President of Griffith College Diarmuid Hegarty is actively involved in promoting the Bologna Process for a Europe-wide Higher Education Network.Griffith College is now established as Ireland's largest private third-level institution with over 7,500 students.