Ambrose was born on a family farm in Grange Con (West Wicklow) in 1954. He qualified as an accountant in 1979. He has worked in a number of organisations (O’Neill Foley & Co Chartered Accountants; Department of Social Welfare; Cantrell & Cochrane (C&C); Asahi; Johnson & Johnson (J&J); Fruehauf; Voluntary Health Insurance (Vhi)) in a career spanning 44 years.
He retired from full time employment with VHI, after 34 years service, at the end of December 2016. In that time, he held a number of senior finance positions in the company. In addition to his accountancy qualification he is a qualified Compliance practitioner and in that regard was appointed Chief Compliance Officer in VHI in 2012 while Vhi was successfully pursuing authorisation of its insurance activities by the Central Bank of Ireland.
He is a Director of Brainwave – The Irish Epilepsy Association and sits on the Benevolent Committees (Ireland and Worldwide) of the Chartered Institute of Management Accountants (CIMA). Ambrose is married to June and they live in Naas. They have two sons. He is a regular golfer and walker and has a keen interest in many sports. He enjoys travel and maintains a keen interest in local, national and international politics, business and current affairs. He also enjoys reading fiction.