Andrew graduated from DCU with a BA in Accounting and Finance in 1990. He trained with John Mc Elhinney & Company from 1990 to 1994 qualifying as a Chartered Accountant in 1994.
Andrew worked as an Audit Manager with Malone Power & Company Chartered Accountants from 1994 to 2001 before joining O'Brien Harnett & Associates in 2001. Andrew has been a partner in O'Brien Harnett & Associates since 2003 and works with a wide range of clients including not for profit entities and secondary schools.
He is a keen follower of Liverpool FC and is a Leinster Rugby season ticket holder. He has also acted as Honorary Treasurer of Terenure College RFC for the last 3 years.
To keep fit Andrew runs the Dublin Marathon most years and has finished 8 marathons so far.