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Marcia Mills Ottawa Lawyer

Marcia Mills *

Partner | Co-Leader, National Security and Defence Group Fasken
The laws of tendering and government contracts in Canada are complex – understanding them can be the difference between a procurement that ends in contract award and one that ends in a dispute.
Jurisdiction Northwest Territories, 2026 | Ontario, 1996
Language(s) English
Office(s) Ottawa, Toronto
Contact
*practising through a professional corporation
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Overview

Marcia Mills is a partner, co-founder and co-lead of Fasken’s National Security Group, and a member of the firm's Government Relations and Political Law teams. Her practice focuses on procurement and government contracts, national security and defence (including Canada’s Defence Investment Strategy and the Buy Canadian policy framework), national and international trade agreements, and the federal Defence Production Act and Access to Information Act.

For three decades, Marcia has worked in both the public and private sectors as external and in-house counsel in defence, aerospace, and security and information technology, including a decade with Public Services and Procurement Canada (PSPC), the central purchasing agent for the federal government. During her tenure at PSPC, she provided strategic and legal advice to Canada’s largest public sector buyer and for some of Canada’s largest defence and major Crown procurements.

Marcia draws upon her in-depth understanding to provide practical and strategic advice with respect to evolving issues in the procurement, tendering, and government contracts context, with particular emphasis on the areas of national security, supply chain integrity, the controlled goods and contract security programs, conflict of interest assessment and mitigation, and federal access to information. Marcia regularly represents clients before the Canadian International Trade Tribunal (CITT).

Marcia Mills is a respected voice in her field and a frequent contributor to national media discussions. Her insights have been featured in prominent outlets including The Ottawa Citizen, The Hill Times, and The Canadian Press, where she offers thoughtful commentary on emerging trends and policy developments. As a frequent speaker and writer on procurement and government contracts issues, Marcia has authored the Fasken Guide for Government Contracts, Procurement and Tender Law in Canada – offering a precise and practical overview of the procurement and tendering process in Canada. She is recognized by Best Lawyers Canada and Who’s Who Legal for her work in the area of procurement law.

Achievements

  • Recognized nationwide as a Leading Partner in Public Procurement, Legal 500 2025 to 2026
  • Recognized nationwide in Public Procurement, Chambers Canada 2024 to 2026
  • Recognized in Public Procurement Law and Administrative and Public Law, The Best Lawyers in Canada 2021 to 2026
  • Recognized as Recommended in Government Contracts, Lexology Index 2022 to 2025
  • Recognized as Lawyer of the Year in Public Procurement Law in Ottawa, The Best Lawyers in Canada 2023
  • Recognized as Recommended in Lobbying & Government Relations, Who's Who Legal 2023
  • Lexology, 12/31/2019
2019 Lexology Recognized by Lexology as a Legal Influencer and a Featured Expert on Lexology’s Instruct Counsel.

Experience

  • Krystal Growth Partners acquires Seair Seaplanes, [Deal - Krystal Growth Partners], Seair Seaplanes acquired by private equity firm
  • Thales DIS Canada Inc. disputes procurement decision under the Comprehensive Economic and Trade Agreement and the Canadian Free Trade Agreement, [Case - Thales DIS Canada Inc.], World leading supplier of card security technology and defence contractor disputes procurement decision of the Ontario government
  • Thales Canada Inc. disputes refusal of proposal related to a federal procurement with the Canadian International Trade Tribunal, [Case - Thales Canada Inc.], Leading contractor and systems integrator for defence and security in Canada files complaint, challenging conduct of Public Services and Procurement Canada
  • Indie Semiconductor acquires TeraXion, [Deal - Founders of TeraXion], Acquisition of TeraXion by Indie Semiconductor.
  • Metrolinx completes extensive procurement program to modernize the PRESTO payment system, [Deal - Metrolinx], Canadian transportation agency completes procurement program for payment system.

Career & Education

Education

  • LLB University of Ottawa
  • Bachelor of Nursing

Community involvement

  • Member, Women for Mental Health at The Royal Ottawa Mental Health Centre
  • Past Member, Selection Committee for the Royal Ottawa Hospital Inspiration Awards
  • Volunteer and Guest Speaker for Mental Health Issues
  • Mentor, First Generation Network (FGN) mentorship program
  • Fellow, Canadian Global Affairs Institute (CGAI)

 

Knowledge

  • Dollars To Defence: Federal Funding For Dual-Use And Defence Technologies, 3/31/2026
  • Canada 2026: All Canada, All the Time, 3/5/2026
  • If You Build It, They Will Come -Canada’s Defence Industrial Strategy and the Build-Partner-Buy Approach, 2/25/2026
  • Buy Local, By Law - Ontario Introduces “Buy Ontario Act”, 11/25/2025
  • FASTER, But to Where? The Defence Investment Agency’s Murky Mission, 10/9/2025
  • Update: “Elbows Up and Anchors Aweigh! “Buy Canadian” is Coming to a Federal Procurement Near You!”, 9/10/2025
  • More Than Meets The Eye: Recent Canadian International Trade Tribunal Procurement Inquiry Regulations Amendments Go Beyond Responding to Restrictive Trade Practices, 9/2/2025
  • Federal Procurement Strategy for Indigenous Business (PSIB) Faces Further Scrutiny at the Human Rights Commission, 7/30/2025
  • United for Security and Defence: Canada and the EU Join Forces in a Strategic New Partnership, 7/22/2025
  • Not Canadian Enough, Eh? How the New Interim Policy on Reciprocal Procurement Could Negatively Impact Canadian Federal Suppliers, 7/14/2025

Events

  • Procurement Law for Lobbyists, 4/22/2021
  • Selling to the Canadian Government: Opportunities and Strategies for U.S. Companies, 10/20/2020
  • Reopening for Business: Considerations as You Plan for the Transition, 7/9/2020
  • Reopening for Business: What to think about as you plan for the Transition, 6/25/2020
  • Doing Business with Blacklisted Companies, 6/6/2019
  • Fasken Ottawa Symposium (9th Edition), 6/4/2019

News

  • Marcia Mills comments on the Canadian government’s strategy to secure domestic IP in defence procurement in The Hill Times, 4/15/2026
  • Marcia Mills highlights growing opportunities linked to Canada’s defence commitments in the Ottawa Business Journal, 3/30/2026
  • Marcia Mills discusses the challenges faced by SMEs bidding on federal defence contracts in the Ottawa Business Journal, 11/19/2025
  • Marcia Mills comments on reciprocity and local purchasing requirements in Canada’s new procurement policy in the Ottawa Citizen, 9/30/2025
  • Marcia Mills discusses the federal government’s plan to consolidate procurement rules in The Hill Times, 9/17/2025
  • Marcia Mills comments on the expansion of the National Security Exception mechanism in Canada’s procurement processes in The Hill Times, 8/23/2025
  • Marcia Mills comments on Canada’s new policy aiming to regulate foreign access to federal contracts in The Hill Times, 7/17/2025
  • Marcia Mills comments on Canada’s new procurement policy in the Ottawa Citizen, 7/16/2025
  • Marcia Mills comments on the suggestion of baring U.S. companies from Canadian government contracts in The Canadian Press, 2/17/2025
  • Marcia Mills comments on a proposal to ban U.S. companies from federal contracts in The Hill Times, 1/31/2025

Publications

  • ‘Road to Nowhere’: Local SMEs Explain Their Struggles With Federal Defence Procurement, 11/19/2025
  • New ‘Buy Canadian’ Procurement Policy Could Restrict Canadian Companies From Bidding on Government Contracts, Lawyers Say, 7/16/2025
  • Anything but Ordinary - Critical Reasons why your Government Customer isn’t Typical when it comes to their Data and Information, 7/5/2021
  • Government Contracts, Procurement and Tender Law in Canada, 3/1/2021
  • The Evolution of Defence Procurement in Canada: A Hundred-Year History, 12/14/2020
  • Financing Defence Procurement in Canada: Where is the Oversight?, 12/1/2020
  • Five top reasons why bids don’t succeed (and they aren’t the ones you think!), 3/2/2020
  • Because We Said So: Invoking the National Security Exception to Reduce Access to Dispute Processes for Government Suppliers, 10/26/2019
  • Want to win government business? Don’t be too ‘commercial-centric’, 6/24/2019
  • Government Contracts Procurement and Tender Law in Canada

Speaking Engagements

  • Great Expectations: Are You Thinking of Being a Defence Contractor?, 9/18/2025
  • Defence Procurement Optimization: Options for the Future, 11/29/2023
  • Canada Defence Briefing: Indigenous Procurement in Canadian Defence Procurement, 9/28/2023
  • Fundamental of Canadian Federal Procurement, 10/20/2022
  • Lobbying and Government Procurement: Navigating the Law, Politics and Understanding Business Risks, 4/25/2022
  • Canada Defence Briefing: Canadian Defence Procurement Defence Policy & Global Security, 4/19/2022
  • Defence Deconstructed: Losing Firms and the Procurement Ecosystem, 6/11/2021
  • Government Contracting, 6/3/2021
  • CETA Benefits to Services and Technology Companies in EU & Canada, 5/20/2021
  • Procurement Legal Hot Topics: Coffee with Counsel, 2/24/2021
Speaker Great Expectations: Are You Thinking of Being a Defence Contractor? ABA Business Law Fall Meeting location location Toronto
Speaker Defence Procurement Optimization: Options for the Future Canadian Global Affairs Institute Annual Defence Procurement Conference
Speaker Canada Defence Briefing: Indigenous Procurement in Canadian Defence Procurement Fasken/Fortin Consulting Annual Defence Procurement Conference