Margaret started her law career in 1987 as a litigation lawyer at Edwards, Kenny & Bray, a leading commercial law firm in Vancouver.  In 1997, she was invited to join Tom Berger and Gary Nelson in practice at Berger & Nelson, a firm specializing in Aboriginal and human rights litigation.  Margaret is a proud founding partner of Rosenbloom, Aldridge, Bartley and Rosling, later Aldridge and Rosling, where Tom continued to work as counsel for many years. 

Originally focusing on litigation, Margaret represented Indigenous government clients in western and northern Canada in cases relating to Aboriginal and human rights before all levels of court. Most recently, Margaret and her colleagues successfully represented modern treaty nations and environmental organizations at the Supreme Court of Canada in a matter concerning the proper interpretation and implementation of a modern treaty. 

Margaret has provided legal and strategic advice to Indigenous nations, non-governmental organizations, industry and public sector clients in western and northern Canada on all aspects of Aboriginal law, including matters related to treaty implementation, government relations, economic development, legislative, policy and conservation initiatives, governance, resource use and development, and environmental assessment and regulatory processes. 

She has extensive experience leading complex commercial negotiations, including negotiating economic benefit agreements for major mining projects, gas pipeline and LNG developments, transmission line and hydroelectric projects.  She has advised clients and negotiated agreements on matters relating to fiscal arrangements, economic development, child and family services, and infrastructure development initiatives. 

Margaret believes reconciliation is best achieved through communication, respect and negotiation and, throughout her career has developed deep, respectful and enduring relationships with senior government and industry counterparties in order to advance this objective.

Margaret is proud to serve on the Boards of Spirit North, which empowers Indigenous youth through sport and play and serves over 10,000 youth nationwide, and BGC (formerly Boys and Girls Clubs) South Coast BC.

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