Derek D. Key KC

Sébastien Roy practices in intellectual property and commercial law. He advises and represents clients in litigation and in contractual matters in the different areas of intellectual property law, such as trademarks, copyrights, industrial designs, patents and trade secrets. Sébastien represents clients in judicial or administrative proceedings before the federal and provincial courts in infringement or unfair competition matters involving injunctions and monetary claims. He pro...

Known for her strategic counsel and trial skills, Sandra Barton is a leading civil and commercial litigation lawyer based in the Toronto office. Sandra is recognized as one of the top corporate commercial litigators in Canada by the Canadian Legal Lexpert Directory , and was featured among the country’s leading class actions lawyers in the 2015 edition of The Best Lawyers in Canada . Working seamlessly with clients and counsel across Canada and the U.S., Sandra brings extensive expertis...

Chelsea’s practice focuses exclusively on representing victims of both historical and recent sexual abuse. Her cases often involve those who have been abused as children by teachers, clergy, recreational volunteers, camp counselors, and foster parents. In many of these cases, the institutions who employed or supervised the perpetrator of the abuse are named as a defendant. This may include school boards, recreational organizations, group homes, camps, and religious institutions. Chelsea...

Jean-Nicolas Prévost practises business law with a focus oncorporate, real estate and banking law. An important part of his practice involves drafting and negotiating sale and purchase, development, management and administration agreements for commercial transactions. He has experience in the development of innovative corporate structures, setting up investment funds and drafting agreements between shareholders, investors or creditors. Mr. Prévost has represented institutional a...

Ada Tang is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Real Estate Law. Ada, who practices law in Edmonton, Alberta, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ada is held by other top lawyers in the same geographic and legal practice area.

Brenda Gross is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation. Brenda, who practices law in Toronto, Ontario, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Brenda is held by other top lawyers in the same geographic and legal practice area.

Marie-Christine Gagnon is a top attorney recognized by Best Lawyers in the practice area(s) of Aboriginal Law / Indigenous Practice. Marie-Christine, who practices law in Ottawa, Ontario, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Marie-Christine is held by other top lawyers in the same geographic and legal practice area.

Sandra Astolfo is a Partner at WeirFoulds with a practise devoted to infrastructure and construction law. She has worked with her clients for almost 25 years and is a frequent speaker at continuing legal education programs and industry conferences. From negotiating construction agreements, to providing contract administration advice, to litigating, mediating and arbitrating disputes, Sandra advocates on behalf of all project participants. She also assists her clients with protecting their int...

Roger is a Partner at Singleton Urquhart Reynolds Vogel LLP and Co-Chair of the Corporate Commercial Group, which he has helped build during his two decades with the firm. He specializes in reorganizations, acquisitions, shareholder agreements, succession planning, commercial lending and borrowing, and commercial leases. A member of the bar in both British Columbia and Ontario, he offers extensive experience in negotiating and drafting documents relating to asset purchase agreements; franchis...

Douglas Harrison is an independent commercial arbitrator and mediator, handling both international and domestic Canadian business disputes. He also acts as legal counsel in select matters, including designing arbitral procedures and enforcing arbitral awards, as well as doing opinion work. Mr. Harrison is a Fellow of the Chartered Institute of Arbitrators, a member of the CPR Panels of Distinguished Neutrals as both an arbitrator and mediator (Global Panel, Product Liability Panel and Pro Bon...