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

1,044 Profile Views

Allison Jones

Feb 05, 2026

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

If you need a Corporate and Commercial Litigation law lawyer, John Siwiec is the one to call. Great job and very responsive team. They kept me in the loop and always had time to explain the details of...

Judy Klocko

Feb 05, 2026

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

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...

Alice Beier

Feb 05, 2026

Professional service and clear communication provided by John Siwiec in Ottawa

It's hard finding a reliable lawyer these days, but John Siwiec in Ottawa is definitely one of the good ones. Would use them again if needed without hesitation. They are professional, responsive, and...

Antonia Satterfield

Feb 05, 2026

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

John Siwiec is fantastic and very professional. Don't hesitate to hire them if you're in Ontario and need help. They really know their stuff and will go the extra mile to make sure you're taken care o...

Erma Braun

Feb 05, 2026

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

Everyone at John Siwiec's office in Ottawa 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 just...