Title : Lawyer, Partner Year of call : 2015

Expertise : litigation | insurance law | construction law

Hotline: 873 389-5098

Me Charles Guay practices litigation in insurance law, civil and professional liability law, commercial law and construction law. He is the leading partner of the firm's Insurance and Liability Practice Group and specializes mainly in litigation involving fraud or other complex claims for insurers. His experience and practice have led him to regularly plead before the civil courts and to assist clients in alternative dispute resolutions. 

He regularly provides training in his fields of expertise, is an accredited trainer at the Chambre de l'assurance de dommages (ChAD) and is involved as a lecturer at the École du Barreau and the Faculty of Law of the Université de Sherbrooke. As a student, he has taught legal research, acted as a research assistant in administrative and labour law and organized a fundraising event to raise a significant amount of money for the modernization of the law library.

Demonstrating rigour and professionalism in the execution of the mandates entrusted to him, he distinguishes himself by his pragmatic and personalized approach advocating the prevention and resolution of disputes.

Assistant: Johanne Boutet


  • Litigation (insurance, construction, disciplinary, disciplinary, remedies of all types, civil liability)
  • Insurance law (builders’ risk insurance, directors and officers, fraudulent claims)
  • Construction Law


  • LL.B., Université de Sherbrooke (2014)

Professional experience

  • Cain Lamarre, Sherbrooke (2015 to present)

Lecturing, conferences, publications

  • Lecturer at the École du Barreau du Québec in obligation law (2019 to this day) 
  • Lecturing on expert testimony with the Honorable Katheryne A. Desfossés (In collaboration with the faculties of law and medicine of the Université de Sherbrooke), February 2022 
  • Lecturing on joint expertise in collaboration with the Barreau du Québec - Concept and jurisprudential trends (2018 to date) 
  • Conference on fraudulent insurance claims accredited by the Chambre de l’assurance dommages (ChAD) - The processing of fraudulent claims - Columbo's tools! (since 2020 ) 
  • Conference on civil liability in collaboration with the Chambre de l'assurance de dommages (ChAD) - The various civil liability plans in Quebec (since 2020) 
  • Lectures on joint expertise in collaboration with the Chambre de l’assurance dommages - A puzzle for insurers and courts (2020) 
  • Commentary on St-Louis v. La Presse - Joint expert opinion and right to a hearing, Repères, Éditions Yvon Blais (January 2022) 
  • Commentary on Lamarche v. Riendeau - The parameters of the joint expertise, duty of the parties, Repères, Éditions Yvon Blais (October 2021) 
  •  Commentary on Maurais v. Gagnon - Nuances of parental responsibility and the impact of lack of supervision, Repères, Éditions Yvon Blais (August 2021) 
  • Commentary on Tang (Marché Principal) v. Promutuel Centre-Sud, société mutuelle d’assurances générales - Intentional fault of an insured struggling with financial difficulties: the fire that leaves traces..., Repères, Éditions Yvon Blais, January 2021 
  • Commentary on Bill 75, An Act to improve justice accessibility and efficiency: main modifications to the Code of Civil Procedure, Repères, Éditions Yvon Blais (December 2020) 
  • Commentary on Sacciadis v. Promutuel Vallée du St-Laurent - False declarations when declaring a claim: the obligation of the insured to give "the true story" and the means of proof, Repères, Éditions Yvon Blais (September 2020) 
  • Commentary on Maltais v. Attorney General of Quebec - Relative immunity under public law and state liability in neighborhood disturbances, Repères, Éditions Yvon Blais (July 2020) 
  • Commentary on Bouanani v. Aviva Insurance Company of Canada - A vehicle accident under nebulous circumstances: the reality of fraudulent insurance claims, Repères, Éditions Yvon Blais (May 2020) 
  • Commentary on Cran-Québec II v. Mario Roy Excavations inc. The contractor's guarantee against poor workmanship in the light of the obligation to inform the client, Repères, Éditions Yvon Blais (March 2020) 
  • Commentary on Jauvin v. Ski Bromont - The intensity of the accessory safety obligation and the causal link under study, Repères, Éditions Yvon Blais (February 2020) 
  • Chronicle - Joint expertise: situation after three years of case law, Repères, Éditions Yvon Blais (August 2019) 
  • Commentary on Maxant v. Ziegler - Common expertise and medical liability: spotlight on proportionality and access to justice, Repères, Éditions Yvon Blais (July 2019) 
  • Commentary on Webasto v. Transport TFI 6 - A first leading decision regarding joint expertise, Repères, Éditions Yvon Blais (April 2019) 
  • Commentary on Transport TFI 6, S.E.C. v. Espar inc. - Joint expert opinion, but at what price? Repères, Éditions Yvon Blais (March 2019) 
  • Lecturer in Mock Civil Trial and Law of Obligations, Faculty of Law of the Université de Sherbrooke (2018 to 2020) 
  • Municipal Jurisprudence Chronicle: Ensuring compliance with municipal regulations: a discretionary power of municipalities, Magazine Bâtivert, vol. 20, (2016) 
  • Research assistant in administrative law, with Professor Suzanne Comtois, Université de Sherbrooke, Sherbrooke (2014) 
  • Teaching assistant in legal research, Université de Sherbrooke (2013) 

Associations, committees, boards

  • Member, Comité de vérification et ressources informationnelles (SOQUIJ) 
  • Member of the Board of Direction for the Société québécoise d’information juridique (SOQUIJ)
  • Vice-chairman, board of directors, Association des diplômés en droit de l’Université de Sherbrooke (ADDUS)
  • Member of the Organisation committee for the «Meetings and Talks» of ADDUS
  • Member, board of directors, Caisse Desjardins du Lac-Memphrémagog
  • Observer member, board of directors, Memphrémagog Conservation Inc. (MCI), a non-profit whose mission is to protect Lac-Memphrémagog and its watershed


  • Winner, 2014 Desjardins Foundation award for volunteer involvement
  • Winner, 2014 Grondin Savarese scholarship for outstanding involvement and leadership in the law faculty while maintaining academic excellence
  • Team member Université de Sherbrooke for the Pierre-Basile-Mignault Moot Court Competition (2014)
  • Named to Dean’s List, Faculty of Law, Université de Sherbrooke, for academic excellence (2014)
  • Award of excellence, legal writing, Les Éditions Yvon Blais (2012)
  • Awarded Université de Sherbrooke law faculty entrance scholarship for students with a life science concentration (2011)