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

1,041 Profile Views

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Simon Murray

Feb 03, 2026

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

Just wanted to say a huge thanks to John Cassell and the staff. They really went above and beyond for me and my family during a very difficult legal battle. We couldn't have done it without their cons...

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Johnny Mitchell

Feb 03, 2026

Great people who truly care at John Cassell - the best legal team in Alberta

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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Valerie Ziemann

Feb 03, 2026

Highly recommend John Cassell for anyone needing expert Privacy and Data Security Law help in Alberta

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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Kathy Schmitt

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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Santos Sauer

Feb 03, 2026

Reliable lawyer you can count on - John Cassell provided excellent service throughout

I've worked with a few lawyers in Calgary over the years, but John Cassell stands out for their honesty and thoroughness. They were clear about the process and kept me updated at all times. I felt con...