Cassidy O'Sullivan

4.5 (32 reviews )

Los Angeles California United States

Commercial Litigation

Recognized in Ones to Watch since 2026

213-788-4340 Website

About Cassidy

Cassidy O'Sullivan is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation.Cassidy, who practices law in Los Angeles, California, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Cassidy is held by other top lawyers in the same geographic and legal practice area.

Cassidy O'Sullivan is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation.

Cassidy, who practices law in Los Angeles, California, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Cassidy is held by other top lawyers in the same geographic and legal practice area.

Practice Areas

Commercial Litigation

Education

New York University

Awards & Recognition

Recognized: Commercial Litigation

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Reviews

4.5 / 5

32 Reviews

1,035 Profile Views

David Daugherty

Feb 04, 2026

Five stars for the incredible team at Cassidy O'Sullivan in Los Angeles - they are amazing

Really glad I found Cassidy O'Sullivan 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 i...

Kari Dietrich

Feb 04, 2026

Outstanding experience with Cassidy O'Sullivan in Los Angeles - truly the best legal team

Short and sweet: Cassidy O'Sullivan is the real deal and a true professional in the field of Commercial Litigation law. If you're in Los Angeles and need help with your legal issues, call them immedia...

Kathryn Rath

Feb 04, 2026

Excellent legal representation provided by Cassidy O'Sullivan for my Commercial Litigation law case

Cassidy O'Sullivan is fantastic and very professional. Don't hesitate to hire them if you're in California and need help. They really know their stuff and will go the extra mile to make sure you're ta...

Randy Wintheiser

Feb 04, 2026

Would recommend Cassidy O'Sullivan for sure to anyone in Los Angeles needing legal help

I wasn't sure who to call for my Commercial Litigation law problem, but I'm so glad I went with Cassidy O'Sullivan. They really listened to me and understood my situation. It was such a relief to have...

Vicki Cartwright-McKenzie

Feb 04, 2026

Really helpful and compassionate service from everyone at Cassidy O'Sullivan's firm