About Lamb & O'Brien Professional Corporation

Lamb & O'Brien Professional Corporation is a small Ottawa law firm that practises exclusively in criminal and regulatory law, representing individual, corporate, and institutional clients. Dominic Lamb and Meghan K. O'Brien co-founded the firm in 2019. The criminal side covers matters from provincial offences through indictable Criminal Code charges, Youth Criminal Justice Act cases, and drug offences under the Controlled Drugs and Substances Act. The regulatory side focuses on professional discipline and fitness to practise proceedings, particularly for health professionals, along with offences under statutes such as the Occupational Health and Safety Act and the Competition Act.

Lamb was called to the Ontario bar in 2001 and worked as a sole criminal defence practitioner before joining Michael Edelson's office in 2009. Lamb is a Certified Specialist in Criminal Law and a past president of the Defence Counsel Association of Ottawa. O'Brien was also called to the Ontario bar in 2001, spending the early part of a career at Gowling WLG's Ottawa office focused on professional liability and medical defence before opening an independent practice in 2016. An LL.M. from the University of Cambridge shaped O'Brien's later move into criminal law, and O'Brien now serves as the firm's managing principal.

In the community

  • Dominic Lamb has lectured on criminal law at the university level and for foreign jurists and policing organizations, and has served on the planning committee for the DCAO/CCLA Criminal Law Conference.
  • Meghan K. O'Brien has been a member of the Law Society of Nunavut's Discipline Committee since 2014 and is a legal member of the Ottawa Health Science Network Research Ethics Board.

Good to know

A person using a wheelchairAccessible parkingA professional woman in a suit beside a briefcaseWoman-ownedA laptop showing a video callVirtual appointmentsAn office interior with a desk and chairsIn-person services

Fees & payment

A clipboard with a speech bubble and a no-charge dollar coinFree consultation

Certified Specialists

A designation granted by the Law Society of Ontario, not a self-declared area of focus.

This firm’s lawyers at a glance

Languages on the roster
English, French

Where to find them

180 Elgin Street, Suite 710, Ottawa, ON K2P 2K3 · 613-560-5982

Is this your firm?

Fix or remove this listing, or add a free listing badge

Something wrong with this listing? Tell us and we’ll hide it right away while we review your request, then correct it or take it down.

Add your free listing badge

Add the free LawOnline listing badge to your website. It tells visitors you’re listed in an independent Canadian lawyer directory and links back to this profile. Being listed isn’t a certification or an endorsement, and the badge doesn’t mean we’ve checked your credentials.

LawOnline.ca Canadian Lawyer Directory listing badge

Similar firms in City of Ottawa

LMS Lawyers LLP

10 lawyers · Est. 1988

LMS Lawyers LLP is a full-service law firm based in Ottawa, with additional offices in Kanata, Almonte, and Iqaluit, Nunavut. Founded roughly three decades ago, the firm practices family law, criminal defence, civil l…

Family LawFamily LawCriminal DefenceCriminal DefenceCivil Litigation & Dispute ResolutionCivil Litigation & Dispute ResolutionBusiness & Corporate LawBusiness & Corporate Law

Edelson Foord Law

8 lawyers

Edelson Foord Law is an Ottawa criminal defence firm with more than 75 years of combined experience among its lawyers. The team, led by founding counsel Michael Edelson, represents clients throughout Ontario and beyon…

Criminal DefenceCriminal DefenceAdministrative & Regulatory LawAdministrative & Regulatory Law

ALX Legal

5 lawyers

ALX Legal is a solicitor based law firm headquartered in Ottawa, Ontario, with additional offices in St-Isidore and Hawkesbury. Its lawyers practice in both English and French and focus on business and corporate law, …

Business & Corporate LawBusiness & Corporate LawReal Estate LawReal Estate LawWills, Estates & TrustsWills, Estates & TrustsAgricultural LawAgricultural Law

This listing was generated by AI from public sources in September 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on the firm’s own website. Verify licence status in the Law Society of Ontario directory ↗

How this data is compiled and checked · Correct or remove this listing