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

1,036 Profile Views

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Felipe Bogan

Feb 03, 2026

Many thanks to John Cassell for the hard work and dedication to my legal matter

Really glad I found John Cassell for my case. They were a huge help and made everything understandable. I was very impressed with their knowledge and how they handled the opposition. If you're in Albe...

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Krystal Morar

Feb 03, 2026

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

Needed help with Privacy and Data Security Law and John Cassell delivered on their promises. They're professional, efficient, and easy to talk to. Good choice for anyone in Alberta looking for high-qu...

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Dennis Kunde

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...

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Marcia Gislason

Feb 03, 2026

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

Honestly, I can't thank John Cassell enough for everything they've done for me. They really know their stuff when it comes to Privacy and Data Security Law and it shows in the results. 10/10 would rec...

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Jimmy Konopelski

Feb 03, 2026

John Cassell did a great job handling my complex Privacy and Data Security Law case from start to finish

Needed help with Privacy and Data Security Law and John Cassell delivered on their promises. They're professional, efficient, and easy to talk to. Good choice for anyone in Alberta looking for high-qu...