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

1,034 Profile Views

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Ramona Fisher

Feb 03, 2026

Simply amazing representation from John Cassell's office during my recent legal matter

Short and sweet: John Cassell is the real deal and a true professional in the field of Privacy and Data Security Law. If you're in Calgary and need help with your legal issues, call them immediately....

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Rafael Kirlin

Feb 03, 2026

So happy with the results of my case thanks to the hard work of John Cassell and staff

Short and sweet: John Cassell is the real deal and a true professional in the field of Privacy and Data Security Law. If you're in Calgary and need help with your legal issues, call them immediately....

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Candace Dicki-Runolfsdottir

Feb 03, 2026

Really helpful and compassionate service from everyone at John Cassell's firm

I've already told all my friends and family about John Cassell. If you need Privacy and Data Security Law help in Alberta, they're the ones to see without any doubt. They are local experts who really...

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Randal Kovacek

Feb 03, 2026

So glad I called John Cassell to handle my Privacy and Data Security Law case in Calgary

Everyone at John Cassell's office in Calgary was so nice and helpful. They made a tough situation a lot easier to deal with by being so patient and explaining everything clearly. I never felt like jus...

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Duane Dicki

Feb 03, 2026

Top notch experts in Calgary - John Cassell is by far the best lawyer I've ever had

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...