Our People

Brent J. Arnold is a seasoned litigator with over 20 years of experience specializing in cybersecurity, privacy, and commercial litigation. He has appeared before all levels of court in Ontario, including the Supreme Court of Canada, and has been recognized in Best Lawyers™ in Canada and the Lexpert Directory. Brent is a respected thought leader and speaker, serving as Chair of the Canadian Internet Society and holding leadership roles in multiple legal and technology organizations. His expertise lies at the intersection of law and technology, where he provides practical guidance on managing complex litigation, cyber risk and data breach response.

 

Brent is a sought-after public speaker and has been quoted in leading national newspapers, appeared several times on CBC television and radio, and hosts the Net Positive podcast.

 

Brent has held leadership positions in the Canadian Bar Association, the Ontario Bar Association, the Advocates’ Society, the International Association of Defense Counsel, and the Defense Research Institute. He currently serves as the Chair of the Canadian Internet Society, a thinktank that advocates for open, accessible, affordable and secure internet access for Canadians. 

 

Recent Experience

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Technology, Cybersecurity & Privacy

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• Breach coach for an international law firm

• Advised a nuclear power plant builder in connection with a data breach

• Breach coach and cybersecurity advisor for a provincial lottery and gaming corporation in connection with various ransomware and credential stuffing attacks

• Advised a U.S. telephone company in a privacy-related dispute with a former service provider

• Counsel to an energy sector technology company in connection with a privacy breach caused by a phishing attack

• Represented a Web3 technology company in a dispute following a failed metaverse platform project

• Defended a U.S. software company in an action by a customer following a failed software implementation project

• Breach coach and cybersecurity advisor for the Canadian entity of an international aid NGO

• Defended a subrogated claim against a digital infrastructure company in connection with a ransomware attack on a customer

• Advised on sales, cybersecurity, and privacy aspects of the asset sale of a public utilities SaaS

• Breach coach for a SaaS vendor in the utilities sector attacked by Qilin

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Litigation & Arbitration

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• Represented Amazon Web Services in the Capital One data breach class action

• Counsel to a foreign cellphone manufacturer in a data privacy dispute

• Counsel for auto parts supplier in dispute with SaaS provider

• Advised an international bank in a dispute with its SaaS vendor

• Represented an online home rental marketplace in several arbitrations across Canada

• Advised a provincial regulator in a contract dispute with its cloud hosting provider

• Represented a Web3 technology company in a dispute following a failed metaverse platform project

• Counsel for a commercial real estate service company in arbitration against a Big Four consulting firm regarding a failed software implementation project

• Appeared in the Supreme Court of Canada in support of the federal government's constitutional reference regarding a national securities regulator

 

Insights & Recognition

 

• Best Lawyers™ in Canada 2025

• Ranked in the Canadian Legal Lexpert Directory 2025

• Ranked in Lexpert Special Edition: Technology 2025

• Mondaq Spring 2025 Thought Leadership Awards (Data Protection)

• 2025 Canadian Legal Lexpert Directory, Data Protection & Privacy

• Lexpert Special Edition: Technology and Health Sciences 2024

• Canadian Legal Lexpert Directory 2024

• 2023 Lexpert Special Edition: Technology and Health Sciences for Data Protection & Privacy

• Mondaq Thought Leadership Award for Autumn 2023 (Intellectual Property)

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• Quoted, A. Smith, “Not coming to you online anytime soon: As other jurisdictions race ahead on digital IDs, some say Canada is moving backwards,” CBA National Magazine, January 5, 2026

• U. Bahr-Gedalia & B. Arnold, “Canada’s AI Crossroads – Why Sovereignty and Speed Must Define Our Future,” Innovating Canada, December 2025

• Interview, “The Value of Your Data and How to Protect It,” CBC Radio’s Just Asking, August 9, 2025

• Interview, “Genetic Testing Kits,” CBC Radio’s Just Asking, June 21, 2025

• Podcast interview, “Verdicts and Voices: A troubling trademark scam, AI hallucination cases and the 1998 Secession Reference,” Modern Law, Canadian Bar Association, May 29, 2025

• Podcast interview, Episode 9, Code and Country, April 8, 2025

• Quoted, N. Stechyson, “What happens to your DNA data now that 23andMe has filed for bankruptcy?,” CBC News, March 25, 2025

• Quoted, “23andMe customers urged to delete personal data,” A. Heydari, CBC’s The National, March 25, 2025

• Quoted, J. Castaldo, “Changing U.S. relationship has thrust Canada’s data sovereignty into the spotlight,” The Globe and Mail, February 27, 2025

• Quoted, A. Heydari, “DeepSeek seems to struggle with questions that would upset Chinese authorities,” CBC News, January 28, 2025

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