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

Contact Me

Login Required

Please login to contact this attorney

Reviews

4.5 / 5

32 Reviews

1,029 Profile Views

Marie Jerde

Feb 04, 2026

Great people who truly care at Cassidy O'Sullivan - the best legal team in California

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...

Marshall Kling

Feb 04, 2026

Great people who truly care at Cassidy O'Sullivan - the best legal team in California

Everyone at Cassidy O'Sullivan's office in Los Angeles 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 fel...

Darlene Yost

Feb 04, 2026

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

Mathew Senger

Feb 04, 2026

Solid work and professional service from Cassidy O'Sullivan in Los Angeles for California residents

Needed help with Commercial Litigation law and Cassidy O'Sullivan delivered on their promises. They're professional, efficient, and easy to talk to. Good choice for anyone in California looking for hi...

Percy Baumbach

Feb 04, 2026

A huge weight off my shoulders thanks to the amazing work of Cassidy O'Sullivan

Just wanted to say a huge thanks to Cassidy O'Sullivan 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 thei...