Daniel Baum

Lawyer, Partner - Montréal

Québec Bar 2010
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Daniel represents private and public sector clients in commercial disputes, administrative and public law proceedings, judicial reviews, arbitrations, class actions, and insolvency matters at both trial and appellate levels.

He has appeared before all levels of courts and tribunals in Québec, the Federal Courts and the Supreme Court of Canada. Daniel regularly acts in multi-jurisdictional disputes involving private international law. He represents clients across a wide range of industries, including the financial, transportation, pharmaceutical, telecommunications, real estate, and technological sectors.

Daniel is a regular speaker on a wide variety of topics relating to advocacy and substantive law. He is an active member of The Advocates’ Society 10+ Standing Committee. For five years, he was a course lecturer in oral and written advocacy at Université de Montréal’s Faculty of Law. 

Before joining Langlois, Daniel was counsel for the federal Department of Justice.


University of Montréal, Master of Laws, LLM, Common Law, 2010

University of Montréal, Bachelor of Laws, LLB, Civil law, 2009

McGill University, Bachelor of Arts, BA, Political Science, 2005

Representative Work

Counsel to a multinational pharmaceutical company in a matter before the Supreme Court regarding fraud and banking law.

Counsel to the Chief Financial Officer of a global engineering and construction firm in a multi-jurisdictional class action alleging misrepresentations under the Securities Act.

Counsel to a Canadian telecommunications company in a consumer class action involving international data roaming fees.

Counsel to the CEO of a reporting issuer in a matter involving the extraterritorial jurisdiction of Québec’s administrative tribunals.

Counsel to the Chief Adjudicator of the Indian Residential Schools Adjudication Secretariat in matters involving the Indian Residential Schools Settlement Agreement.

Counsel to a major financial institution in a case involving cheque fraud.

Counsel to an airline and travel company in an international commercial dispute.

Counsel to a junior mining company in a dispute arising from the acquisition of the Canadian Malartic Mine.

Counsel to one of Canada’s largest energy companies in proceedings to obtain the disclosure of information identifying online wrongdoers.

Counsel to a Canadian university in matters before the Access to Information Commission.

Counsel to a multinational pharmaceutical company in a RAMQ investigation and related judicial proceedings.




Other Publications


Coauthor with Megan Keenberg, “Case management arbitration: A resource for alleviating the backlog”, The Advocate’s Journal, Vol. 40, No. 3, Winter 2021, p. 10-13.

“Réussir le mentorat : entrevue avec Me Valérie Lemaire, récipiendaire du prix Excellence en Mentorat du Québec 2020” (Successful Mentoring: Interview with Valérie Lemaire, recipient of the 2020 Quebec Excellence in Mentoring Award), Advocacy Matters, The Advocate’s Society, Winter 2021, p. 24-26.

“Interview with The Honourable Justice Marie-Andrée Vermette, Superior Court of Justice”, Advocacy Matters, The Advocate’s Society, Fall 2021, p. 20.

Coauthor with Sean Griffin, “Nevsun and Beyond: Canadian Corporations Face In-creased Liability Risk for Human Rights Abuses Commit-ted Abroad”, Développements récents en enquêtes internes et réglementaires 2021, Service de la qualité de la profession du Barreau du Québec, vol. 502, p. 121.

Coauthor with Sean Griffin of the article “Corporate responsibility: What happens abroad doesn’t stay there”, The Lawyer’s Daily, February 15, 2018.


“Conducting Effective Remote Examinations with Lillian Pan”, Friends Who Argue Podcast, Season 1, Episode 9, June 28, 2021.


External Conferences


2021 – Cospeaker with Antoine Brylowski, Sean Griffin & Sophie Perreault, “Les développements récents en enquêtes internes et réglementaires” (Recent developments in internal and regulatory investigations), Québec Bar, November 18, 2021.

2021 – Copanellist, “Case Management Arbitration”, ADRIC Arbitration Forum for CanArbWeek 21, The Arbitration Landscape in Canada, September 21, 2021.

2017 – “Investigating and Litigating Fraud”, Canadian Bar Association’s 13th National Insolvency Conference, Saint John, September 14-15, 2017.


Since 2020 – Member of the 10+ Standing Committee of the Advocates’ Society

Professional Associations

Lord Reading Law Society 

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