Mark O’Donnell2019-01-08T17:05:04+00:00

Mark O’Donnell, Founding Partner


Coverage • Professional Liability • Environmental & Property • General Liability • Additional Services


Mark has extensive litigation experience involving property and casualty insurance-related matters, issues relating to insurance coverage, bodily injury claims, defence of errors and omissions claims brought against insurance brokers, real estate agents and other professionals, defence of sexual abuse claims against institutions and for insurers in related coverage matters and acting for domestic and foreign primary and excess insurance carriers in the defence of insured claims and in coverage disputes.

Mark is an advisor to leading domestic and international insurers with respect to numerous cases involving multi-party toxic tort claims, environmental litigation and insurance coverage matters.  He is coordinating counsel in connection with the defence of numerous toxic tort and hazardous waste site claims against insureds. He provides legal research and drafts opinion associated with various types of insurance-related issues. He also provides assistance to carriers with respect to policy wordings and drafting.

Mark also has extensive trial and appellate experience as legal counsel in insurance-related matters, and considerable arbitration, ADR and mediation experience.

Mark received his Honours Bachelor of Commerce degree from McMaster University in 1979. He was awarded his Bachelor of Laws degree from York University in 1982. He was called to the Bar in 1984.


Insurance Institute of Canada • Associate Member of the Insurance Council of Canada • Defence Research Institute • Canadian Defence Lawyers Association • Canadian Bar Association • President of Oakville Short Track Speed Skating Club