We never lose sight of our clients' objectives, and we work creatively to achieve them.

Brent S. Colasurdo
- (949) 679-0052
- [email protected]com

Ryan S. Dean
- (949) 679-0052
- [email protected]

Halim Dhanidina
(949) 679-0052
[email protected]
The Honorable Halim Dhanidina (Ret.) is a partner at the prestigious criminal defense firm of Werksman Jackson & Quinn LLP in Los Angeles, where he handles challenging and high profile criminal cases. He serves as co-counsel with Umberg/Zipser in a variety of civil matters as the firm’s Senior Trial and Appellate Counsel.

Ethan Feng
- (949) 679-0052
- [email protected]
Ethan Feng is an associate at Umberg/Zipser where he focuses his practice in complex commercial litigation, professional liability disputes, and employment litigation.

Martin Fessenmaier, Ph.D.
- (949) 679-0052
- [email protected]

Mark A. Finkelstein
- (949) 679-0052
- [email protected]
Mark Finkelstein is a partner at Umberg/Zipser with more than 25 years of intellectual property and complex litigation experience.

Scott B. Garner
- (949) 679-0052
[email protected]
Scott B. Garner is a partner at Umberg/Zipser in Irvine, California. He represents clients in complex business litigation matters, with a particular focus on professional liability disputes and ethics counseling.

Phillip R. Kaplan
Partner
(949) 679-0052- [email protected]
Phillip R. Kaplan is a recognized leader in the Orange County legal community, and is an accomplished business trial lawyer with a record of handling his client’s most difficult cases.

Ellen S. Kim
(949) 679-0052- [email protected]
Ellen Kim is an Associate at Umberg/Zipser LLP (U/Z) where she focuses her practice in complex commercial litigation.

Priti Phukan, Ph.D.
- (949) 679-0052
- [email protected]

Carole E. Reagan
- (949) 679-0052
- [email protected]

Todd W. Smith
- (949) 679-0052
- [email protected]

Adina W. Stowell
- (949) 679-0052
- [email protected]
Adina Stowell specializes in complex litigation involving corporate, commercial, trade secret, and real estate disputes in both state and federal courts.

Jason Tejani
Jason Tejani concentrates his practice on patent prosecution and intellectual property (IP) transactional matters. Prior to his legal career, he was a chemist at a global chemical company.

Mei Tsang
- (949) 679-0052
- [email protected]

Thomas J. Umberg
- (949) 679-0052
- [email protected]

Vikki L. Vander Woude
- (949) 679-0052
- [email protected]

Dean J. Zipser
(949) 679-0052- [email protected]
Dean J. Zipser is a recognized leader in the Orange County legal community, having served as President of the Orange County Bar Association (OCBA) along with many other professional leadership positions.