David R. Tenszen

David R. Tenszen


Practice highlights


In 2016, David Tenszen retired from Thomson Rogers.

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David Tenszen represented accident victims and disabled persons in personal injury, medical malpractice and disability insurance litigation.

David appeared on behalf of clients at all levels of court, including the Ontario Court of Appeal, the Federal Court of Appeal and the Supreme Court of Canada where he was successful on behalf of Appellants/Plaintiffs on two different occasions (Sarvanis v. Canada [2002] 1 S.C.R. 921 and Isen v. Simms [2006] 2 S.C.R. 349).

David lectured at educational programs organized by the Law Society of Upper Canada, the Canadian Institute, the Brain Injury Associations of Niagara, Sault Ste. Marie, Sudbury, Peterborough, Belleville and Ottawa, Mothers Against Drunk Drivers and other medical, rehabilitation and insurance industry groups.

David had the honour of having been selected by his peers for inclusion in The Best Lawyers in Canada® 2016 in the field of personal injury litigation. David also had the honour of having been selected by his peers to be published in the Canadian Legal Lexpert® Directory 2015 as a leading practitioner in the field of Personal Injury Litigation. David was also recognized by the Brain Injury Association of Niagara for his outstanding support for the Association and for those they serve.

Year of Call



  • Bachelor of Arts, Trinity College at the University of Toronto (1981)
  • Bachelor of Laws, Osgoode Hall Law School (1986)


  • Lexpert Ranked (2015)
  • Listed in The Best LawyersTM in Canada 2016
  • The Advocates’ Society
  • The Ontario Trial Lawyers Association
  • The Metropolitan Toronto Lawyers’ Association
  • The Medico-Legal Society of Toronto
  • Past Director of the Brain Injury Association of Toronto

Industry recognition


S. Family

Mr. David Tenszen,

We thank you, very much, for the great job you have done for us.

R.L. and S.L.

Dear Mr. Tenszen,

We just wanted to say thanks to you and your staff for doing such a great job on obtaining a generous and timely settlement. We managed to pay off some bills and invest in our future thanks to your efforts. We will recommend you to anyone needing your services without hesitation.

I think we were a little surprised at the settlement…we were grinning from ear-to-ear when we got outside.

AR & Family

Dear Mr. Tenszen and Staff,

My family and I would like to thank you very much for all your support and understanding. Your compassion and gentle approach reassured us that we were in good hands.

All the best.

D & M C

D and I will always be grateful to you. You had a difficult case in front of you and you pulled it off. We were always very confident in your abilities.

Thanks also to Wendy and Andrea who tried to keep our spirits up.

Thanks again.

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