Mr Crennan was a barrister at the Victorian Bar including as a Queen's Counsel. His areas of expertise included Banking and Finance, Continuous Disclosure and Markets. Mr Crennan was a director of a number of publicly listed and private companies. Mr Crennan commenced as Deputy Chair and Head of Enforcement at the Australian Securities and Investments Commission. Mr Crennan has been the principal consultant at Credi Consulting, a boutique consulting firm specialising in strategic advice to participants in the financial system.
Mr Crennan is the Chair of the Risk & Compliance Committee.