Most recently, Paul was appointed by Mr. Justice Dennis O’Connor of the Ontario Court of Appeal to act as senior commission counsel to the Commission of Inquiry into the Actions of Canadian Officials in Relation to Maher Arar. Previously, Paul acted as commission counsel in the Walkerton Inquiry. In this role, Paul was responsible for ensuring all necessary evidence was brought forward to determine the cause of the May, 2000 e coli water supply crisis.

As an advocate and advisor on legal and public policy issues, Paul has provided advice and representation to trade unions, professional organizations, and governments concerning law reform issues. Paul presently acts as counsel to such professional organizations as the Ontario Crown Attorneys' Association, the Ontario English Catholic Teachers Association and the Air Line Pilots Association. He also represents judges, doctors, nurses and other professionals. As well he has represented the Major League Baseball Players Association, National Basketball Players’ Association, and the National Basketball Association Referees’ Union. In representing these sports associations Paul has argued the leading sports law cases before the Ontario Labour Relations Board. Paul also has extensive experience in mediation and alternative dispute resolution.

As a leading counsel in the education law field, Paul has been extensively involved in constitutional litigation over educational and denominational school rights. This includes cases such as the extension of full funding to Roman Catholic Separate Schools and defeating the Ontario Government’s 1997 injunction application to force striking teachers back to work under Bill 160.

In the area of International Law, Paul has been an invited expert at international conferences on labour-management relations in Canada, the U.S., and Mexico under NAFTA and the North American Agreement on Labour Cooperation (NAALC) as well as representing clients before the International Labour Organization.

In addition to lecturing part-time at Osgoode Hall Law School on administrative law and judicial review and authoring legal articles, Paul makes frequent presentations on legal issues at the provincial, national, and international level. In 1999 Paul was a featured Lecturer at the Cambridge University Lectures in England.