About Chantale

Chantale Cousineau-Mahoney is an associate at Gibson Tanner Rabin LLP and a member of its Commercial and Corporate Law Group. She graduated from the University of Ottawa's French Common Law program, where she won the Tax Executives Institute Award for the highest marks in tax law, and was called to the Ontario bar in 2017. She holds an MBA and a Chartered Professional Accountant (CPA, CGA) designation, and before practising law she held senior federal public service roles including Assistant Deputy Minister and Chief Financial Officer. Her practice focuses on business and corporate transactions, corporate restructuring, mergers and acquisitions, and estate and succession planning, and she provides pro bono services to the Council on Aging of Ottawa. She's fluent in English and French.

Practice areas

Business & Corporate Law

Education & credentials

Other degrees
Master of Business Administration (MBA)
Chartered Professional Accountant (CPA, CGA)

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This listing was generated by AI from public sources in September 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on their firm’s website. Confirm Chantale Cousineau-Mahoney’s licence and standing in the Law Society of Ontario directory ↗

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