Experience
Integrity
Results
Firm Overview
About Us
Umberg/Zipser LLP is a premier business litigation and intellectual property boutique law firm. Drawing on decades of experience in some of the nation’s largest and most prestigious law firms, as well as national and state government service, our lawyers provide exceptional work with the unparalleled personal service of a boutique.
Our Culture
Umberg/Zipser believes in giving back, both to our community and to our profession. We regularly handle pro bono matters, and our attorneys devote countless hours to supporting — and leading — professional and community organizations. It would be difficult to find another firm in Orange County, regardless of size, that can boast the number of community leaders that exist at Umberg/Zipser.
Why Us?
By combining big-firm experience with small-firm efficiencies, we can handle complex matters for large companies, but we also are nimble enough to represent small companies and entrepreneurs. Our clients come to us because we deliver the highest quality work product together with extraordinary service.
Practice Areas
We Have the Experience to Handle a Wide Array of Matters
Professionals
We Have Exceptional Attorneys Who Stand Ready to Serve Our Clients
Brent S. Colasurdo
- (949) 679-0052
- [email protected]
Ryan S. Dean
- (949) 679-0052
- [email protected]
Halim Dhanidina
(949) 679-0052
[email protected]
Halim practices in U/Z’s trial practice group after retiring as an appellate court justice with Division Three of the California Court of Appeal, Second Appellate District in LA.
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.
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.
NEWS and EVENTS
Umberg/Zipser in the Community
Project Youth’s Annual Meeting Event
Umberg/Zipser (U/Z) congratulates our partner, Mark Finkelstein, on his election to the Board of Directors for Project Youth OCBF. Mark was sworn in on Tuesday evening at Project Youth’s Annual Meeting and Society of Fellows Recognition Reception held at The Boardwalk in Irvine. U/Z partner, Dean Zipser, who has served as a board member for approximately 15 years, was sworn in as a member
Umberg/Zipser Again Sponsors OCBA Charitable Fund’s Raise Your Glass Fundraiser
The OCBA Charitable Fund’s recent annual “Raise Your Glass” event was once again a special experience. Umberg/Zipser (U/Z) continued to be a sponsor and our attorneys play a prominent role in the organization. Scott Garner is the Charitable Fund’s current president, Dean Zipser is a past president, and Mei Tsang has been a long-time board member. The OCBA’s mission is “To Enhance the System
Umberg/Zipser Continues Key Roles at ABTL Annual Seminar
Umberg/Zipser LLP (U/Z) once again had a meaningful role in the Association of Business Trial Lawyers’ (ABTL) 47th Annual Seminar, “Evolution of Business Litigation: Adapting and Overcoming” on October 20-24, 2021. Vikki Vander Woude is an ABTL board member and served on the planning committee for the event. Hon. Halim Dhanidina (Ret.) participated on the panel and delivered one of two closing arguments at
Umberg/Zipser Named to Orange County Best Law Firms List for 2022
Umberg/Zipser LLP (U/Z) is pleased to announce that the firm again has been ranked Tier One in the “Best Law Firms” list by U.S. News & World Report and Best Lawyers® for the Orange County metropolitan area. The ranking showcases top law firms recognized by clients and peers for delivering professional excellence and for high-quality ratings and indicate a unique combination of quality in
Umberg/Zipser Sponsors OCAABA Annual Moon Festival Mixer
Umberg/Zipser LLP (U/Z) was proud to sponsor The Orange County Asian American Bar Association’s (OCAABA) Annual Moon Festival Mixer being held October 22, 2021at the Newport Beach Civic Center. U/Z has been proud to sponsor the event for several years. OCAABA serves this diverse county by mentoring local law students, promoting diversity in the private and public sectors, organizing and volunteering for legal clinics
Umberg/Zipser Named CRF-OC’s 2021 Law Firm of the Year
Umberg/Zipser LLP is proud to be honored as the 2021 “Law Firm of the Year” by the Constitutional Rights Foundation, Orange County (CRF-OC). CRF-OC recognized the firm’s contributions to the organization’s mission of empowering Orange County youth to be active, responsible citizens through participation in interactive civic and law-related education programs that connect students directly with professionals and community leaders. U/Z has a long
CAREERS
If you are an exceptional attorney who thrives on delivering top-notch client service, and would enjoy practicing law in a small, collegial environment, we invite you to contact us to learn more about how we can support your career growth. Umberg/Zipser is proud of its diversity, and is an equal opportunity employer.