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

1,035 Profile Views

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James Johns

Feb 03, 2026

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

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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Kate Walker

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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Velma Purdy

Feb 03, 2026

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

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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Darren Robel

Feb 03, 2026

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

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...

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Karla Stroman

Feb 03, 2026

The absolute best in Calgary for Privacy and Data Security Law - and I mean that from the bottom of my heart

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...