JCW Wylie acted as a consultant for many years to the Law Societies in both parts of Ireland. He was also appointed leader of the Department of Justice and Law Reform Commission Joint Project on the reform of land and conveyancing law, which resulted in the enactment of the Land and Conveyancing Law Reform Act 2009.
He has been an external examiner for Irish universities and the King's Inns for over 40 years. He was a director of Butterworths Ireland from 1988 to 2004 and remains a key figure in Irish legal publishing. He was Professor of Law at Cardiff University from 1971 and is the author of the leading texts on Irish property law, including Irish Land Law, Irish Conveyancing Law and Irish Landlord and Tenant Law (all published by Bloomsbury Professional).
Prof Wylie has been a consultant to A&L Goodbody since 1993.