Alexander Bissonnette

Lawyer and Practice Lead, Commercial Litigation

About Alexander

Phone

Main line: (613) 722-1500

Direct line: (613) 369-0358

Nelly | Law Clerk: (343) 700-0241

Email & Fax

Fax: (613) 722-7677

I am the Practice Lead of the Commercial Litigation Group at Mann Lawyers. My practice is devoted exclusively to litigation and dispute resolution, with a focus on commercial disputes, construction and real estate-related disputes, and insolvency proceedings.

I represent businesses, shareholders, professionals, and individuals in a wide range of litigation matters. I regularly represent clients in contractual disputes, shareholder and oppression claims, franchise disputes, debt recovery and enforcement proceedings, construction matters, real estate disputes arising from commercial and residential transactions, commercial tenancy issues, procurement matters, and other commercial and business conflicts. I also act for parties in insolvency and restructuring matters, including receivership and CCAA proceedings.

I work closely with clients to develop practical, strategic, and cost-effective solutions to disputes and litigation matters. I regularly appear before the Ontario Superior Court of Justice and represent clients through all stages of the litigation process, including motions, applications, discoveries, mediations, trials, and appeals.

In addition to my commercial litigation practice, I am also a member of Mann Lawyers’ Estate Litigation Group and I assist clients with estate-related disputes, including matters involving wills, powers of attorney, capacity issues, and guardianships.

I joined Mann Lawyers as a student, completed my articles with the firm, and was called to the Bar in Ontario in 2017. Prior to that, I earned my law degree from Queen’s University Faculty of Law in 2016, where I was actively involved with Queen’s Legal Aid and assisted students and Kingston residents with a variety of legal issues. Prior to law school, I earned a Bachelor of Social Sciences in Political Science and Public Administration from the University of Ottawa.

Outside the office, I enjoy travelling, trivia, and following a wide variety of sports.

Alexander's Service Areas

Commercial Litigation
Experienced representation in complex business disputes, including contract claims, debt collection, shareholder and partnership conflicts, and other commercial litigation matters.
Condominium Law
Construction Law
Legal advice and dispute resolution for construction projects, including contracts, liens, delays, defects, procurement issues, and project risk management.
Estate Litigation
Resolving disputes involving wills, trusts, estates, powers of attorney, and capacity issues through negotiation and mediation.

The Latest From Alexander

Blog |
Commercial Litigation
By: 

Posted May 4, 2026

The 2025 Ontario Court of Appeal decision of Correa v. Valstar Homes (Oakville Sixth Line) Inc. (2025 ONCA 156), demonstrates that “time is of the[...]
Blog |
Commercial Litigation
By: 

Posted March 18, 2026

Rectification is a long-standing recognized equitable remedy that the Court may grant as a means of correcting errors in the recording of terms in written[...]
Blog |
Commercial Litigation
By: 

Posted January 20, 2026

The 2025 Ontario Court of Appeal decision of Gallant v Johnson (2025 ONCA 419) demonstrates the limitations of the Court to fix for the parties[...]
Blog |
Commercial Litigation
By: 

Posted February 25, 2025

The 2024 decision of the Ontario Court of Appeal in Preiano v. Cirillo (2024 ONCA 206) provides valuable insight into the quantification of damages that[...]
Blog |
Commercial Litigation
By: 

Posted August 29, 2023

Specific performance refers to the Court-ordered remedy that the parties must proceed with completing a real estate transaction. The recent Court of Appeal decision of[...]
Blog |
Commercial Litigation
By: 

Posted August 17, 2021

The recent Superior Court decision of Leis v Lee (2021 ONSC 3683), which involved dueling oppression applications by two shareholders, provides guidance as to how[...]