Ontario - Canadian Arbitration Association

2026-10-14

Matthew L.O. Certosimo

Matthew Certosimo is a mediator and arbitrator with ADR Chambers. Matt has over 34 years’ experience in all areas of employment and labour disputes including wrongful/constructive dismissal, grievance arbitrations, human rights, workplace disputes, labour relations, workers’ compensation, collective bargaining, employment...

2026-10-14

Mark S. Hayes

Mark Hayes is an arbitrator and mediator with ADR Chambers, bringing more than 40 years of experience to the resolution of complex commercial, technology and intellectual property disputes. Mark’s areas of expertise include technology, intellectual property, copyright, entertainment and media law,...

2026-10-05

Peter C. Wardle

Peter Wardle is an arbitrator and mediator with ADR Chambers. Peter has more than 40 years of experience in complex dispute resolution. His areas of expertise include contract disputes, shareholder and partnership disputes, securities, directors’ and officers’ liability, professional negligence, insurance,...

2026-10-05

Norman A. Keith

Norman (Norm) Keith is a mediator, arbitrator and investigator with ADR Chambers. Norm has experience in employment, labour relations, human rights, ethics violations, commercial, corporate governance, executive misconduct, construction and securities law. He also has experience resolving disputes in alcohol and drugs in...

2026-08-18

Richard Macklin

Richard is a mediator and arbitrator with ADR Chambers. Richard served part-time, from 2006 to 2018, as a Vice-Chair with the License Appeal Tribunal for Ontario, conducting hearings and arbitrations. Richard has also been a civil litigator for over 30...

2026-03-11

The Honourable Robert Keith Rae

Bob Rae is an arbitrator and mediator with ADR Chambers. Mr. Rae is a Canadian lawyer, diplomat, and former politician whose career spans senior roles in public office, law, and international diplomacy. He built a distinguished career as a mediator,...

2026-02-27

The Honourable Petra E. Newton

Petra Newton is an arbitrator and mediator with ADR Chambers. Ms. Newton is a retired Justice of the Ontario Court of Justice (1989 to 2024). As a judge, Ms. Newton presided over proceedings in a variety of criminal cases. The...

2026-02-27

Brian A. Blumenthal

Brian is a mediator, arbitrator and investigator with ADR Chambers. He has extensive experience in the administrative justice sector in Ontario. His areas of expertise includes employment and human rights disputes, sexual harassment, workplace harassment, discrimination and reprisal, occupational health...

2025-01-03

Michael L. Maynard

Michael Maynard is a mediator, settlement officer & investigator. Expertise in administrative, civil, code of conduct/disciplinary matters, contract, insurance, landlord/tenant, and workplace disputes.

2025-01-03

Frank Zaid

Frank Zaid, a Toronto mediator and arbitrator at ADR Chambers. He specializes in franchises and intellectual property disputes.

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