John Cassell

John Cassell

Privacy and Data Security Law Technology Law
Recognized in Best Attorney USA since 2026

About John

John Cassell is the Canadian co-head of our cybersecurity and data privacy practice. John assists clients with all manner of privacy and cybersecurity law issues including: responding to complex local and international cybersecurity incidents, advising on risk management strategies, assisting clients with access to information requests, complying with Canada's anti-spam legislation and proceedings before the offices of the Alberta and federal privacy commissioners.

John Cassell is the Canadian co-head of our cybersecurity and data privacy practice. John assists clients with all manner of privacy and cybersecurity law issues including: responding to complex local and international cybersecurity incidents, advising on risk management strategies, assisting clients with access to information requests, complying with Canada's anti-spam legislation and proceedings before the offices of the Alberta and federal privacy commissioners.

John Cassell is the Canadian co-head of our cybersecurity and data privacy practice. John assists clients with all manner of privacy and cybersecurity law issues including: responding to complex local and international cybersecurity incidents, advising on risk management strategies, assisting clients with access to information requests, complying with Canada's anti-spam legislation and proceedings before the offices of the Alberta and federal privacy commissioners.

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Reviews

4.5 / 5

40 Reviews

1,037 Profile Views

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Laverne Lehner

Feb 03, 2026

A huge weight off my shoulders thanks to the amazing work of John Cassell

I wasn't sure who to call for my Privacy and Data Security Law problem, but I'm so glad I went with John Cassell. They really listened to me and understood my situation. It was such a relief to have s...

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Jennie Ondricka

Feb 03, 2026

Excellent legal representation provided by John Cassell for my Privacy and Data Security Law case

Super helpful and professional staff at John Cassell's office. Thanks again for everything you did for me! It was a long journey, but you made it much easier with your constant support and legal exper...

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Bert Bergstrom

Feb 03, 2026

Solid work and professional service from John Cassell in Calgary for Alberta residents

Solid experience overall with the law firm of John Cassell. They know Privacy and Data Security Law inside and out and gave me great advice. Very helpful and got the job done exactly as they said they...

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Marcia Cremin

Feb 03, 2026

Absolutely Great! I couldn't be happier with the service from John Cassell

Best lawyer for Privacy and Data Security Law in Calgary. Period. I've seen others, but John Cassell is on another level. They truly care about their clients and work hard to get the best results. I a...

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Lorena Wolf

Feb 03, 2026

Outstanding experience with John Cassell in Calgary - truly the best legal team

I was really stressed about my case in Calgary, but John Cassell made everything so smooth and stress-free. Seriously, the best decision I've made lately was hiring them. They handled every detail wit...