John Siwiec

4.6 (37 reviews )

Ottawa Ontario Canada

Corporate and Commercial Litigation Intellectual Property Law

Recognized in Best Attorney USA since 2024

613-238-2022 Website

About John

John Siwiec is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation and Intellectual Property Law.John, who practices law in Ottawa, Ontario, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John is held by other top lawyers in the same geographic and legal practice area.

John Siwiec is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation and Intellectual Property Law.

John, who practices law in Ottawa, Ontario, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John is held by other top lawyers in the same geographic and legal practice area.

Practice Areas

Corporate and Commercial Litigation

Intellectual Property Law

Awards & Recognition

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Reviews

4.6 / 5

37 Reviews

1,046 Profile Views

Drew DuBuque

Feb 05, 2026

The absolute best in Ottawa for Corporate and Commercial Litigation law - and I mean that from the bottom of my heart

If you're looking for someone who actually cares and will fight for you, go to John Siwiec. They helped me out big time with my Corporate and Commercial Litigation law issue and kept me informed at ev...

Stuart Howell

Feb 05, 2026

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

Short and sweet: John Siwiec is the real deal and a true professional in the field of Corporate and Commercial Litigation law. If you're in Ottawa and need help with your legal issues, call them immed...

Blake Satterfield

Feb 05, 2026

A very good experience overall with the entire team at John Siwiec's legal practice

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

Megan Kreiger

Feb 05, 2026

Would recommend John Siwiec for sure to anyone in Ottawa needing legal help

Just wanted to say a huge thanks to John Siwiec 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 const...

Brendan Hammes

Feb 05, 2026

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

Best lawyer for Corporate and Commercial Litigation law in Ottawa. Period. I've seen others, but John Siwiec is on another level. They truly care about their clients and work hard to get the best resu...