This is a photo of David Leonard photo


Chief Executive Officer


Contact by email at [email protected]

t. +1 416-601-7694


Law School

University of Western Ontario

Bar Admission

Ontario, 1994

Every day, Dave executes on his vision for the future of our firm – one where clients and the industries in which they operate are paramount

As CEO, Dave leads McCarthy Tétrault’s mission to be Canada’s premier provider of legal services to public and private enterprises in Canada and around the world. Dave helps the firm achieve this mission by supporting our partners and professionals across the country to deliver creative solutions and exceptional business advice so that clients can achieve their objectives. He drives the firm’s strategy to offer true borderless client service through our commitment to meeting client needs now and in the future.

Bold steps and a commitment to doing things differently

As leader of one of the most storied firms in the country, and with more than 20 years of experience as a litigator, Dave is relentlessly focused on deepening client relationships and building the law firm of tomorrow. Under his leadership, the firm has realigned along the industry lines that matter to our clients, to better serve their needs. In January 2017, he announced McCarthy Tétrault’s game-changing acquisition of MT>3 (formerly Wortzmans), the country’s top e-Discovery and information governance law firm. This move brought MT>3’s leading expertise in information governance, e-discovery and technology under one roof with the firm’s integrated, national platform to ensure clients receive seamless and superior service. Additionally, in order to better serve the firm’s clients with their cross-border objectives, Dave spearheaded the opening of our New York office in May 2017.

Visionary leadership founded on integrity and inclusiveness

Overseeing almost 600 lawyers and operations in Vancouver, Calgary, Toronto, Montréal, Québec City, New York and London (UK), Dave has made it a priority to incorporate the perspectives, experiences and insights of people across the firm to build a cohesive plan for the future of the business. 

Dave is a vocal advocate for diversity and inclusion and is particularly passionate about removing the barriers which have historically prevented women from advancing in traditional law firms. The firm’s industry-leading Inclusion Now program, dedicated to diversity, inclusion and corporate social responsibility, was founded and achieved tremendous results under Dave’s leadership. It is the first-of-its-kind in the Canadian legal profession, and was awarded Diversity Initiative of the Year in 2020 by Canadian Law Awards.

Dave is an active member of the United Way’s Campaign Cabinet. As part of the firm’s Inclusion Now program, Dave spearheaded the firm’s commitment to donate $5 million to United Way Centraide, over 5 years, to support United Way’s efforts to ensure that background and circumstance are not barriers to opportunity.

Dave received his LLB from the University of Western Ontario in 1992 and was called to the Ontario bar in 1994. Dave practised in our litigation group, representing a wide range of clients. In 2012 he was appointed National Practice Group Leader for litigation before assuming the role of CEO in 2016.