Michael O'Neill
About Michael O'Neill
Michael O'Neill is a lawyer based in Ottawa, ON and has been recognized in The Best Lawyers in Canada™ since 2025. Michael O'Neill is recognized in the following practice area:
- Ottawa, Ontario
- Intellectual Property Law
Current Firm: Marks & Clerk Canada | Marks & Clerk Law LLP
Location: Ottawa, ON
It takes just a few minutes to optimize your profile for clients looking to engage and lawyers who are ready to refer.
Activate your profile and highlight why your peers recognized in Best Lawyers today.
Nearby Lawyers
Jonathan Richardson is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Jonathan, who practices law in Ottawa, Ontario, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jonathan is held by other top lawyers in the same geographic and legal practice area.
Laura Gomez is an Ottawa-based partner who advises on regulatory law, practising primarily in the area of product regulation, compliance and enforcement and corporate commercial law. Laura assists clients with regulatory and commercial issues relating to the commercialization of foods, supplemented foods, non-prescription (OTC) and prescription drugs, natural health products, cosmetics, devices, cannabis, consumer products and controlled drugs. She has particular experience in advising client...
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.
Sean Bawden is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation and Labour and Employment Law. Sean, 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 Sean is held by other top lawyers in the same geographic and legal practice area.
Derek Keay is a partner in the firm’s Ottawa office. Derek practises corporate law with an emphasis on corporate finance and mergers and acquisitions, primarily involving emerging technology companies. His primary focus is on providing advice to Canadian and international companies, together with angel, venture capital and institutional investors in relation to debt and equity financing transactions. He also has extensive experience in advising companies, shareholders and acquirers in c...
Karen Hamway is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative and Public Law and Professional Malpractice Law. Karen, who practices law in Ottawa, Ontario, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Karen is held by other top lawyers in the same geographic and legal practice area.
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, national and international trade agreements, and the federal Defence Production Act and Access to Information Act . For almost 30 years, Marcia has worked in both the public and private sectors as external and in-house counsel in defence, aerospace, ...
Sebastien Huard is a top attorney recognized by Best Lawyers in the practice area(s) of Labour and Employment Law. Sebastien, who practices law in Ottawa, Ontario, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sebastien is held by other top lawyers in the same geographic and legal practice area.
Michael L. Phelan is a top attorney recognized by Best Lawyers in the practice area(s) of Aboriginal Law / Indigenous Practice, Alternative Dispute Resolution and Intellectual Property Law. Michael L., who practices law in Ottawa, Ontario, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael L. is held by other top lawyers in the same geographic and legal practice area.
An award-winning and highly sought-after lawyer, Guy has experience in complex commercial litigation (including class actions), administrative law and constitutional law cases. Guy frequently appears before the Supreme Court of Canada (SCC), the Superior and Appeal Courts of Ontario and Québec, the Federal Court (FC) and Federal Court of Appeal (FCA). Guy was named to the Order of Canada in 2022, recognizing his contributions as a lawyer, notably to pro bono work, and for his volunteer...
Explore and Learn
Recognizing Legal Leaders: The 2027 Best Lawyers Awards in Australia, Japan and Singapore
by Jamilla Tabbara
Market drivers, diversity trends and the elite practitioners shaping the legal landscape.
How Far Back Can the IRS Audit You?
by Bryan Driscoll
Clear answers on IRS statutes of limitations, recordkeeping and what to do if you are under review.
Musk v. Altman: The Lawyers Behind the Case
by Jamilla Tabbara
Meet the Trial Lawyers Shaping One of AI's Biggest Legal Disputes.
The Best Lawyers in France 2027: Peer-Reviewed Excellence
by Jamilla Tabbara
Seventeen editions of peer trust, a growing profession and a dynamic legal market.
Announcing the 2027 Best Lawyers Awards: Austria, Germany and Switzerland
by Jamilla Tabbara
Celebrating the legal professionals throughout Central Europe.
The Legal Teams Behind the Blake Lively–Justin Baldoni Settlement
by Grace Greer
A closer look at the legal teams and attorneys involved in the Blake Lively–Justin Baldoni litigation and its resolution.
How AI Is Changing the Way Clients Find Lawyers
by Jamilla Tabbara
Best Lawyers CEO Phil Greer explains how AI-driven search tools are reshaping legal marketing and why credibility markers matter.
When Is It Too Late to Stop Foreclosure?
by Bryan Driscoll
Understanding the foreclosure timeline, critical deadlines and the legal options that may still protect your home.
Can You Go to Jail at an Arraignment?
by Bryan Driscoll
Understanding What Happens at Your First Court Appearance.