Maureen Killoran, K.C.
About Maureen Killoran, K.C.
Maureen Killoran, K.C. is a lawyer based in Calgary, AB and has been recognized in The Best Lawyers in Canada™ since 2013. Maureen Killoran, K.C. is recognized in the following practice areas:
- Calgary, Alberta
- Aboriginal Law / Indigenous Practice
- Administrative and Public Law
- Alternative Dispute Resolution
- Appellate Practice
- Bet-the-Company Litigation
- Corporate and Commercial Litigation
- Energy Law
- Environmental Law
- Oil and Gas Law
Current Firm: Osler, Hoskin & Harcourt LLP
Location: Calgary, AB
Nearby Lawyers
Craig Story is a partner in the Capital Markets and Mergers & Acquisitions Groups. He has served on the firm’s Partnership Board, as well as on the management group for the Calgary office. Craig’s practice focuses on corporate and securities law, including public and private capital markets offerings, private equity and venture capital funds, mergers and acquisitions and corporate governance. His corporate finance practice includes advising issuers, major investors and underwr...
Ryan Mullins is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law and Personal Injury Litigation. Ryan, who practices law in Calgary, Alberta, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ryan is held by other top lawyers in the same geographic and legal practice area.
Dereck is a senior family law lawyer, having practiced exclusively in this area since being called to the Alberta Bar in 1995. Dereck holds a B.A. (Hons.) from McGill University followed by his L..L.B. from the University of Alberta. As a skilled litigator, he has appeared successfully at all levels of court in Alberta as well as in numerous arbitrations. Dereck also has extensive experience in negotiating settlements and drafting agreements. He applies a reasoned approach to his files and en...
David Bishop is a partner at Gowlings and head of Calgary's Advocacy Group. David’s practice involves all aspects of corporate/commercial litigation with an emphasis on directors' and officers' defence, product liability, professional liability disputes, shareholder disputes, class actions, large property and industrial claims, and environmental litigation. He is familiar with all aspects of dispute resolution, including private mediations, judicial dispute resolution conferences and ar...
Frank Y. Sur is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Mergers and Acquisitions Law and Securities Law. Frank Y., who practices law in Calgary, Alberta, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Frank Y. is held by other top lawyers in the same geographic and legal practice area.
Tom Valentine has more than 30 years of experience in the oil and gas industry, both as a barrister and a solicitor. In 2002 and 2003, Mr. Valentine lived in Doha, Qatar, where he was senior counsel (projects) with Qatar Petroleum. While in Qatar, Mr. Valentine was responsible for a number of international gas and LNG projects, including projects in the United Kingdom (Qatargas II), India (RasGas) and Spain (Endesa Generacion). Since returning to Canada Mr. Valentine’s work continues to...
Alison is a skilled labour and employment lawyer. She advises employers in Alberta and Ontario in a wide range of industries across the public and private sectors, including oil & gas, banking, food and agriculture, aviation, and health care. Alison works closely with in-house counsel as well as human resources and labour relations professionals providing strategic advice on labour relations, arbitration, collective bargaining, human rights, employment policies and procedures, disability ...
Clara is a leading energy regulatory lawyer who specializes in the power sector. She is currently serving as head of the firm's Litigation & Dispute Resolution Group in B.C., managing the litigation departments in those offices. Clara advises clients on a broad range of matters before regulatory boards and the courts, including market rules and compliance, long-term resource planning, electricity export permits, international power line approvals, rate design, and capital project permitti...
Blake Hafso is a top attorney recognized by Best Lawyers in the practice area(s) of Labour and Employment Law. Blake, who practices law in Calgary, Alberta, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Blake is held by other top lawyers in the same geographic and legal practice area.
Brad practices as a Mediator, Arbitrator and Collaborative lawyer. He is a partner with the family law firm of Moe Hannah LLP in Calgary, Alberta. His practice assists clients in negotiating out-of-court settlements, mediation, collaborative law, arbitration, and litigation. Brad teaches Negotiation as a sessional at the University of Calgary’s Faculty of Law. He was an invited panelist for LESA on Advanced Matrimonial Property issues and Mediation. Brad completed his LLB at the Univers...
Explore and Learn
2026 Best Lawyers Awards: Recognizing Legal Talent Across the United States
by Jamilla Tabbara
The 2026 editions highlight the top 5% of U.S. attorneys, showcase emerging practice areas and reveal trends shaping the nation’s legal profession.
Gun Rights for Convicted Felons? The DOJ Says It's Time.
by Bryan Driscoll
It's more than an administrative reopening of a long-dormant issue; it's a test of how the law reconciles the right to bear arms with protecting the public.
2026 Best Lawyers Awards in Canada: Marking 20 Years of Excellence
by Jamilla Tabbara
Honoring Canada’s most respected lawyers and spotlighting the next generation shaping the future of law.
How to Sue for Defamation: Costs, Process and What to Expect
by Bryan Driscoll
Learn the legal standards, costs and steps involved when you sue for defamation, including the difference between libel and slander.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
How to Choose a Good Lawyer: Tips, Traits and Questions to Ask
by Laurie Villanueva
A Practical Guide for Your First-Time Hiring a Lawyer
Holiday Pay Explained: Federal Rules and Employer Policies
by Bryan Driscoll
Understand how paid holidays work, when employers must follow their policies and when legal guidance may be necessary.
Reddit’s Lawsuit Could Change How Much AI Knows About You
by Justin Smulison
Big AI is battling for its future—your data’s at stake.
Unenforceable HOA Rules: What Homeowners Can Do About Illegal HOA Actions
by Bryan Driscoll
Not every HOA rule is legal. Learn how to recognize and fight unenforceable HOA rules that overstep the law.