Website: mcinnescooper.com
Head office address (Canada): McInnes Cooper Tower, 1969 Upper Water Street, Suite 1300, Halifax, NS B3J 3R7
Year established: 1859
Ownership structure: independent Canadian law firm
Target market/client profile: employers, plan sponsors, and public and private sector organizations seeking legal counsel in pensions and benefits, labour and employment, and corporate law
Number of professional staff: 250+ lawyers; 500+ total staff
Canadian office locations: Halifax (head office), Fredericton, Charlottetown, Moncton, Saint John, St. John’s, Sydney
McInnes Cooper is a full-service law firm and one of Canada’s 25 largest, with offices spanning four Atlantic provinces. Its pensions and benefits practice advises plan sponsors, trustees, and administrators at both regional and national levels.
McInnes Cooper traces its origins to a Halifax law practice founded in 1859, making it one of Atlantic Canada’s oldest firms. The firm says its current form draws from several well-respected Atlantic Canadian firms that merged over time.
An early figure tied to the firm’s Halifax roots, Jonathan McCully, is recognized as a Father of Confederation and brought political clout to the practice during its first decade.
McInnes Cooper handled several major legal matters in Atlantic Canadian history over its first 125 years. In 1912, the firm acted as counsel for the White Star Line, the company that owned the Titanic.
In 1917, McInnes Cooper represented the owners of the Mont-Blanc after the munitions ship exploded in Halifax Harbour. In 1982, the firm acted for Mitsubishi, builder of the Ocean Ranger, when the offshore drilling rig capsized off the coast of Newfoundland.
The firm’s work also grew beyond the region. McInnes Cooper represented the Province of Nova Scotia in the Royal Commission into Donald Marshall Jr.’s wrongful conviction. In 1992, the firm worked on the Nova Scotia Power privatization, which it says was Canada’s largest IPO at the time.
From 2007 to 2013, it led the Manuge SISIP class action on behalf of disabled veterans, and the Federal Court sided with the veterans in 2012. An approved settlement in that case exceeded $900 million.
In 2024, McInnes Cooper led another major veterans’ settlement that the Federal Court approved. The deal covered underpaid disability pensions for more than 330,000 veterans, valued between $435 million and $817 million.
The firm grew its office network steadily through the late 1990s and beyond. Moncton opened in 1997 and Saint John followed in 2000, giving the firm six Atlantic offices.
A 2014 merger with Ottenheimer Baker, a St. John’s firm, made McInnes Cooper the largest in Newfoundland and Labrador. In 2022 and 2023, two mergers with Sydney-based firms brought Cape Breton into its reach.
The firm offers a wide range of legal services, with several practice areas that matter most to plan sponsors and HR leaders:
The firm also operates MC+, a set of complementary services. These include MC Training for fixed-fee legal workshops and MC Advisory for business consulting work.
Kevin J. Kiley, KC, serves as managing partner of McInnes Cooper and sits on the firm’s board. He handles insolvency work for banks and advises investment dealers. Kiley also chairs the board of directors of the Atlantic Economic Council, a role he took on in 2025.
The leadership team includes Kiley and other senior partners and executives at McInnes Cooper:
McInnes Cooper operates under a board of directors made up of partner-elected members. The board oversees firm-wide strategy and governance under the chair’s direction. The board includes:
The board sets the firm’s long-term direction, including the MC Reimagined five-year plan focused on business growth, engagement, and innovation. McInnes Cooper also reports annually on diversity and inclusion progress through its MC Belonging strategy.
McInnes Cooper serves clients across all four Atlantic Canadian provinces and beyond. Its client base spans:
The firm’s pensions and benefits work covers plan sponsors, trustees, employee groups, and administrators. It advises on:
McInnes Cooper also represents Atlantic Canadian pension plans on private investments through special-purpose corporations.
On the labour side, the firm advises both unionized and non-unionized employers across sectors. Industry experience runs deep in:
Through its Lex Mundi membership, the firm handles cross-border files for clients with international footprints. The network covers more than 125 countries. McInnes Cooper also appears in our BPM Legal Directory page with full contact details.
McInnes Cooper has drawn recognition from Canadian legal rankings and industry awards. The firm and its lawyers also hold ties to several professional bodies.
McInnes Cooper also ranks second on Lexpert’s list of the largest law firms in Atlantic Canada. The firm sits at number 21 on Lexpert’s list of Canada’s largest law firms overall.
The firm runs a Collective Social Responsibility program covering community work, the environment, pro bono services, wellness, and IDEA. It also reports yearly under the MC Belonging strategy.
Federal Court OKs deal for the underpayment of disability pensions to over 330,000 Canadian veterans
