- University of Toronto, J.D. (Hons.)
- Acadia University, B.B.A.H.
David Rankin carries on a general commercial litigation practice which includes appellate litigation, administrative and constitutional litigation, class actions, and other general civil litigation. David has appeared as counsel before the Supreme Court of Canada on ten separate occasions. He has also appeared as counsel in the Federal Court of Appeal, the British Columbia Court of Appeal, the New Brunswick Court of Appeal, the Federal Court of Canada, and the superior courts of various provinces. David is a co-author of Sopinka and Gelowitz on the Conduct of an Appeal, 4th Edition, a leading resource for litigators and judges on appellate practice and procedure.
David joined Osler as a litigation associate in 2012 after serving as a law clerk to The Honourable Mr. Justice Morris J. Fish of the Supreme Court of Canada. He received his Juris Doctor from the University of Toronto, where he graduated with the W.P.M. Kennedy Silver Medal. During his time at the Faculty of Law, David was co-Editor-in-Chief of the Law Review (Vol. 68). Prior to law school, David graduated from Acadia University — at the top of his faculty — with a Bachelor of Business Administration with Honours. David first joined Osler as a summer student in 2008, returning in 2010-2011 to complete his articles in the Calgary office.