In 2004, David founded Roy O’Connor LLP, a litigation boutique in Toronto. He was previously a partner in the litigation department in a large national law firm. His practice is focused on commercial and class action litigation (both defence and plaintiff side). Benchmark Canada has consistently recognized David as a litigation star in class actions and commercial litigation, with peer praise for his “prowess” in both areas. David was recognized by Benchmark Canada® as a finalist for Class Action or Plaintiff Litigator of the Year in eight of the last 10 years, and in 2023, was named as the Plaintiff Litigator of the Year. He has been listed in the Lexpert®/ROBSpecial Edition:Canada’s Leading Litigation Lawyers, as well as the Lexpert® Guide to the Leading US/Canada Cross-Border Litigation Lawyers in Canada. He is ranked in the Chambers Guide to Canada’s Leading Lawyers in Class Actions and ranked by The Best Lawyers in Canada in the area of corporate and commercial litigation. David was recognized in Canadian Lawyer magazine as one of the finalists for the Top 25 Most Influential Lawyers in Canada in 2015 and again in 2016. In 2006, David was recognized by Lexpert® as a finalist for the "Top 40 Under 40."
