• 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,...
  • 2026-08-18

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,...
  • 2025-08-11

The Honourable Joseph R. Nuss

The Honourable Joseph R. Nuss, C.M., K.C., Ad. E., FCIArb, is a domestic and international arbitrator and mediator with ADR Chambers.  His areas of expertise include commercial, real estate, construction, employment, shareholder and insurance disputes. Mr. Nuss is a former...
  • 2025-08-08

Roger B. Greenberg

Roger Greenberg is an arbitrator and mediator with ADR Chambers. Roger has arbitrated and mediated cases including those involving contract, employment, construction, real estate, intellectual property, franchise, malpractice, banking, insurance, tax, eminent domain, securities and other disputes. Roger is an...
  • 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

Howard Winkler

Through his commercial litigation experience, Howard also has experience in insurance, employment, shareholder, entertainment, intellectual property, landlord/tenant and real estate disputes. He has acted for media and plaintiffs and defendants in defamation matters and has a balanced perspective on the ...
  • 2025-01-03

Paul Winfield

Paul is an arbitrator and mediator with ADR Chambers. Paul has over 33 years of construction experience, progressing from site to executive level on commercial developments, industrial, transportation and infrastructure, oil and gas, processing plants, airports, rail, civil engineering, and nuclear facilities.
  • 2025-01-03

The Honourable Daniel H. Tingley

The Honourable Daniel H. Tingley, bilingual mediator and arbitrator at ADR Chambers. He specializes in insurance, real estate, employment, commercial, investments, franchise, medical disputes, malpractice, family disputes, intellectual property, First Nations and partnership disputes.
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