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

1,036 Profile Views

Saul Trantow

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...

Jacqueline Cremin

Feb 04, 2026

Top notch experts in Los Angeles - Cassidy O'Sullivan is by far the best lawyer I've ever had

If you need a Commercial Litigation law lawyer, Cassidy O'Sullivan 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 my cas...

Pablo Hand

Feb 04, 2026

Reliable lawyer you can count on - Cassidy O'Sullivan provided excellent service throughout

I appreciate how Cassidy O'Sullivan handled my case. No fluff, just straight to the point and very effective representation for my Commercial Litigation law matter. They are obviously very experienced...

Barbara Hauck

Feb 04, 2026

Reliable lawyer you can count on - Cassidy O'Sullivan provided excellent service throughout

It's hard finding a reliable lawyer these days, but Cassidy O'Sullivan in Los Angeles is definitely one of the good ones. Would use them again if needed without hesitation. They are professional, resp...

Lila Lockman

Feb 04, 2026

A very good experience overall with the entire team at Cassidy O'Sullivan's legal practice