Our lawyers
Biography
Mario Paul-Hus has dedicated his professional practice to municipal law. Consequently, he has worked on numerous cases involving many Quebec cities and municipalities. His experience in municipal matters is well sought after and he has worked on many real estate development cases.
His acquintance with the municipal world is an important asset for the municipalities he represents as well as for the firm's clients who work with municipalities. When faced with complex problems he formulates innovative propositions that take into account the important parameters of the municipal legislation, always finding solutions which promote the client's interest.
Me Paul-Hus is a certified ethics advisor and he has developed much useful expertise in the field of municipal contracts. He frequently represents his clients before tribunals in cases related to municipal law.
Mario Paul-Hus
Principal Partner
Municipal and administrative law | Condominium Law | Labor Law
Contact
514 954 0440 I poste 11
Patrice Hockenhull
Partner
Litigation | Municipal Law | Expropriation | Real Estate Law
Contact
514 954 0440 I poste 25
Biography
Me Hockenhull was admitted to the Quebec Bar in 2014. Me Hockenhull holds a Bachelor of Law from the University of Montreal, where he distinguished himself by appearing on the Dean's Honour List for the excellence of his academic results. Me Hockenhull also holds a Juris Doctor from the prestigious Osgoode Hall Law School. During his studies, Me Hockenhull was awarded scholarships for the excellence of his academic results, including the entrance scholarship awarded to the best college students admitted to the Faculty of Law.
Me Hockenhull is an excellent litigator specializing in municipal and civil litigation and advises his clients on all issues relating to municipal law. He also has a detailed knowledge of issues related to civil liability, having represented insurers in numerous cases. He has extensive experience representing clients before various tribunals, having pleaded before the courts of first instance as well as the Quebec Court of Appeal. He has also pleaded before the Tribunal Administrative of Quebec. Me Hockenhull stands out for his in-depth understanding of legal issues while taking his clients' cases to heart and seeking the best possible solution for them when faced with a legal issue or dispute.
Me Hockenhull recently joined Municonseil, after beginning his career in boutique law firms representing real estate developers, and after practicing in a law firm specializing in municipal law that represented cities and municipalities in Quebec.
Guillaume Rousseau
Partner
Municipal Law | Land Use & Planning | Litigation
Contact
Biography
Guillaume Rousseau has completed his Law licence at the Université de Sherbrooke, followed by a Comparative Law master's with a major in human rights and cultural diversity at McGill University. He articled at Fasken Martineau where he also practiced municipal and urban planning law.
Me Rousseau's work experience was completed at the Québec Justice Department and at the New Brunswick Human Rights Commission. Recently, he acted as advisor to the Québec National Assembly, particularly during the consultations leading to the revision of the Code of Civil Procedure. His post-graduate work, co-tutored by the Université de Sherbrooke and the Université Paris I Panthéon-Sorbonne led to a Ph.D. thesis in the Fall of 2012 and a Ph.D. degree jointly granted by the two universities. The same year saw Me Rousseau's nomination as professor at the Law faculty of the Université de Sherbrooke.
William Rossignol
Lawyer
Litigation | Real Estate Law | Commercial Leases | Municipal Law | Latent Defects
Contact
514 954 0440 I poste 23
Biography
After studies in political science, Me Rossignol obtained a Bachelor of Law degree from Université de Sherbrooke in 2019, and became a member of the Quebec Bar in 2020.
Me William Rossignol practices primarily in litigation within the firm, in civil and commercial law as well as municipal and administrative law. He regularly appears before the Quebec Court, Superior Court, Municipal Courts as well as before various administrative tribunals.
Before joining Municonseil, Me Rossignol practiced notably within a boutique firm specializing in municipal law, and he served as a prosecutor in Municipal Court.
In relation to his practice, Me Rossignol serves a clientele composed of cities and municipalities as well as small and medium-sized businesses. He acts both as a strategic advisor to his clients and as counsel for representations before the courts.
Charles Unterberg
Lawyer
Municipal | Urban planning | Expropriation | Municipal taxation
Contact
Biography
Mr. Charles Unterberg holds a Bachelor of Business Administration with a concentration in Finance from UQAM, obtained in 1993, as well as a Bachelor of Laws from the Université de Montréal, obtained in 2003. He was admitted to the Quebec Bar in 2004.
In 2005, Mr. Unterberg joined Mr. Daniel St-Pierre and Ms. Hélène Maillette, now a judge of the Court of Québec, with whom he developed his expertise in civil and commercial litigation.
Representing primarily small and medium-sized enterprises, which make up the predominant portion of his clientele, he acts as external legal counsel and represents clients in disputes involving commercial leases, contracts, debt collection, and labour relations, as well as in areas such as bankruptcy, mortgage law, and liquor permits.
Mr. Unterberg also represents individuals in matters involving labour law litigation, bankruptcy, divided co-ownership (condominiums), and latent defects.
Mr. Unterberg distinguishes himself through his ability to find creative solutions to his clients’ problems, whether through judicial proceedings, direct negotiation, or settlement conferences. He pays meticulous attention to minimizing inconvenience and costs, both for plaintiffs and defendants in litigation.
Catherine Laperrière
Lawyer
Municipal | Urban Planning | Litigation
Contact
514 954 0440 I poste 27
Biography
Catherine Laperrière was admitted to the Barreau du Québec in 2023 and holds a joint degree in civil law and common law from Université McGill. She was named to the Dean’s Honour List, ranking in the top 10% of her cohort, while also volunteering with a legal clinic serving individuals experiencing homelessness.
Ms. Laperrière then served as a law clerk at the Cour d'appel fédérale, where she worked closely with the Honourable Sylvie E. Roussel on significant cases. She later acted as legal counsel in statutory interpretation and subsequently as a civil litigator at the ministère de la Justice du Canada. In these roles, she developed strong expertise across various areas of law and managed litigation files, primarily in administrative law.
Drawing on these diverse experiences, she is committed to providing pragmatic solutions to her clients’ challenges and takes particular interest in tackling complex legal issu
Patrick St-Onge
Lawyer
Labour Law | Administrative Law | Litigation
Contact
514 954 0440 | poste 31
Biography
Me Patrick Saint-Onge was admitted to the Quebec Bar in 2024 and holds a Bachelor of Civil Law as well as a Graduate Diploma in Common Law and Transnational Law from the Université de Sherbrooke.
He was named to the Dean’s Honour List and also participated in a judicial observation clinical program with judges of the Court of Québec.
Me Saint-Onge subsequently completed his Bar articling placement with the Commission des droits de la personne et des droits de la jeunesse (CDPDJ), before becoming a lawyer within the legal department of the Confédération des syndicats nationaux (CSN).
Through his various professional experiences, he has developed strong foundations in several areas of law and has been responsible for litigation files, primarily in labour and administrative law.
Laurence Casavant-Nault
Lawyer
Labour Law | Administrative Law | Litigation
Contact
514 954 0440 | poste 16
Biography
Me Casavant-Nault holds a law degree from the Université de Montréal, where she graduated on the Faculty Dean’s Honour List. She was admitted to the Quebec Bar in 2025 after completing her articling placement at an international law firm.
Wishing to pursue her passion for public law, Me Casavant-Nault joined the Municonseil team to begin her practice in litigation.
Louis Beauregard
Partner
Municipal | Urban planning | Expropriation | Municipal taxation
Contact
514 954 0440 I poste 22
Biography
Mr. Louis Beauregard, retired lawyer, joined Municonseil in 2024, after having directed the boutique firm Beauregard Avocats, working primarily in the fields of municipal law and real estate law. When he was a prosecutor, he acted as mediator and ethics advisor, and defended clients in urban planning and zoning cases, expropriation and municipal taxation matters, and other aspects of municipal law and public real estate.
Mr. Beauregard has provided legal and strategic services to some of Canada's most important retailers and property owners, as well as to public bodies and individuals dealing with municipal administrations. He has also been referred cases by attorneys who were in conflict of interest situations and has also acted as counsel for other lawyers who did not have the necessary expertise to handle cases in municipal law, urban planning, expropriation, or municipal taxation.
He has acted as a strategic advisor, negotiator with municipal administrations, and has pleaded cases before the Supreme Court, the Quebec Court of Appeal, the Superior Court, the Administrative Tribunal of Quebec, several specialized administrative tribunals, and also before municipal courts.