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.
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.
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.
We Have the Experience to Handle a Wide Array of Matters
We Have Exceptional Attorneys Who Stand Ready to Serve Our Clients
Brent S. Colasurdo
Ryan S. Dean
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.
Mark A. Finkelstein
Mark Finkelstein is a partner at Umberg/Zipser with more than 25 years of intellectual property and complex litigation experience.
Scott B. Garner
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
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.
Carole E. Reagan
Todd W. Smith
Adina W. Stowell
Adina Stowell specializes in complex litigation involving corporate, commercial, trade secret, and real estate disputes in both state and federal courts.
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.
Thomas J. Umberg
Vikki L. Vander Woude
Dean J. Zipser
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
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
Umberg/Zipser LLP (U/Z) is proud to again be named an honoree of The Civic 50 Orange County by OneOC and Points of Light, the world’s largest organization dedicated to volunteer service. The award recognizes U/Z as one of the most community minded companies in Orange County. The Civic 50 OC initiative provides a standard for superior corporate citizenship, and showcases how companies can use their time, skills, and resources
Umberg/Zipser LLP (U/Z) is proud to announce partner Mei Tsang has been elected Secretary of the Orange County Bar Association (OCBA.) Mei has served on the Board of Directors of both the OCBA and the Orange County Bar Association Charitable Fund (OCBACF), the charitable wing of the OCBA for several years. Mei also co-chairs OCBA’s Diversity & Inclusion Committee, and as former chair of
Umberg/Zipser LLP (U/Z) is proud to announce that attorneys Mark Finkelstein, Scott Garner, Carole Reagan, Adina Stowell, Mei Tsang, Thomas Umberg and Dean Zipser have been selected for inclusion in the 2022 edition of The Best Lawyers in America®, and that Brent Colasurdo has been recognized as a Best Lawyers “Ones to Watch.” In addition, Scott Garner and Dean Zipser have each been recognized as
Umberg/Zipser LLP (U/Z) was proud to again sponsor the 2021 Annual Judge Kenneth Lae Charity Golf Scramble hosted by the Orange County Bar Association Charitable Fund (OCBACF) at the Pelican Hill Golf Club in Newport Coast. The Charitable Fund is the philanthropic arm of the OCBA and provides funding and resources to organizations and programs that enhance the system of justice and promote equal
Umberg/Zipser LLP (U/Z) is proud to announce that Priti Phukan, Ph.D. has been recognized as a 2021 Southern California Super Lawyers Rising Star for Intellectual Property. The Rising Stars list recognizes no more than 2.5 percent of attorneys in each state. Priti concentrates her practice on patent and trademark prosecution across various technology industries, including chemistry, life sciences, diagnostics, medical devices, and mechanical engineering. She
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.