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Our Professionals

Martin St-Amant

Co-founder of St-Amant & Vien Avocats d’affaires – Doctor in law


Martin St-Amant is a co-founder of St-Amant & Vien Business Lawyers. He advises businesses of all sizes on all matters relating to business law, international trade law and intellectual property, both nationally and internationally, as well as business immigration.

After earning a Licenciate in Law from the University of Ottawa, a degree in International Studies in Paris, and a doctorate in international commercial law from Université Paris- Sorbonne, St-Amant quickly specialized in this area of law, developing his skills on both sides of the Atlantic. He was part of the North American Free Trade Agreement (NAFTA) negotiating team and has been a partner in major Canadian law firms.

A member of the Québec Bar and several international law organizations, he is the author of numerous texts, articles, and columns on international law—his speciality—both on economic, and public and private law issues.

Marc-Étienne Vien

Co-founder of St-Amant & Vien Avocats d’affaires – Business and tax lawyer

B.Sc – LL.B – D.E.S.S. Fisc

As a tax lawyer practicing corporate law, tax law and business and strategic consulting, Marc-Étienne Vien provides sound advice adapted to the reality of each client.

Prior to co-founding St-Amant & Vien Avocats d’affaires, Vien developed broad expertise in business law after practicing at a large law firm. He also worked in Ottawa as a senior advisor to a federal minister. He is characterized by his ability to listen, his thoroughness, his professionalism and his talent for finding innovative solutions to the most complex legal and business issues.

Marc-Étienne was called to the Québec Bar in 2014 after studying law at Université Laval and science and business administration at McGill University. He also holds an advanced graduate diploma in taxation from HEC Montréal.

Louis-Philippe St-Amant


LL.B – D.E.S.S Business Law

A young lawyer whose energy is matched only by his diligence, Louis-Philippe St-Amant holds a law degree (2018) and an advanced graduate diploma in business law (2019) from the Université Laval’s Faculty of Law. St-Amant was called to the Québec Bar after successfully completing his articling in a major Canadian law firm.

His experience playing for the Rouge et Or football team instilled into him discipline and a focus on performance and results. He was awarded the Prix Maillet Sportif by Université Laval’s Faculty of Law, in recognition of his involvement in sports and academics.




Young lawyer, member of the Quebec Bar since 2022, Eugenia Tamez Ruiz first became interested in immigration law, particularly by volunteering for the organization CARI Saint-Laurent or by participating in the Legal Clinic Profile during her legal training at the University of Montreal.

Subsequently, her curiosity led her to complete her internship at the Quebec Bar in criminal and penal law because of her interest in access to justice and the search for solutions to complex problems.

Currently, she is pursuing a master’s degree in international law at the University of Montreal in order to acquire even more skills.

Since joining our firm, she has resolutely focused her field of practice towards business law. She now takes part in complex transactions such as the acquisition of a company and assists professionals in their incorporation process.



LL.B. – D.D.N.

Christine Lavoie is a seasoned notary law specialist who puts her experience, expertise and thirst for knowledge to use by offering effective, tailored advice to her clients.

Me Christine Lavoie joined S&V Notaires in 2021 after practicing for over 15 years in leading firms in the Québec City area. Greatly appreciated by her peers and clients alike, she has acquired a highly sought-after expertise in notary law during her successful

Christine Lavoie holds a Bachelor of Law and a Notary Law diploma from Université
Laval, as well as a Bsc in Microbiology from the same university.

Contact Us

Quebec Office

824 Myrand Avenue 
Québec (Québec) G1V 2V5
Phone/Fax : 581 814-0774
Email :

Montreal Office

2 Place du Commerce
Suite 218
Montréal (Québec) H3E 1A1
Phone/Fax : 581 814-0774
Email :

S&V Notaires

824 Myrand Avenue 
Québec (Québec) G1V 2V5
Phone:418 687-5454
Fax: 418 687-0540