Experience, Integrity, Results

About Us

Exceptional client service . . . delivered efficiently



Umberg Zipser LLP is a premier business litigation boutique.  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, Umberg Zipser provides clients with unparalleled legal services.

The firm’s lawyers are recognized as among the very best in their practice areas.  They are consistently named as Best Lawyers in America® and Super Lawyers®.  This year, for example, founding partner Dean Zipser was named by Best Lawyers as the Lawyer of the Year for Bet-the-Company litigation in Orange County.

We pursue our clients’ objectives strategically and with maximum efficiency and flexibility across a wide array of practice areas, including intellectual property, class actions, unfair competition, environmental, real estate, and other complex business litigation, as well as white collar criminal defense.


Kim Bick in The Recorder on “Fighting the Law Firm ‘Motherhood Penalty”

Umberg Zipser partner Kim Bick published an opinion piece in The Recorder on Septermber 26,

September 30, 2014 󰀄
Dean Zipser Named to OC Metro’s Top Lawyer List for 2014

U/Z’s Dean Zipser has been named to OC Metro‘s 2014 list of Top Lawyers which

September 1, 2014 󰀄
U/Z Partners Reagan, Umberg and Zipser Honored by “Best Lawyers” for 2015

Umberg Zipser partners Carole Reagan, Tom Umberg and Dean Zipser have been selected by their

August 20, 2014 󰀄
Adina Stowell Elected President of Constitutional Rights Foundation of Orange County

Umberg Zipser LLP is proud to announce that its partner, Adina W. Stowell, has been

July 29, 2014 󰀄
Leading Environmental Lawyer Kim Bick Joins U/Z as Partner

We are pleased to announce that Kimberly Bick has joined Umberg Zipser LLP. Ms. Bick

February 18, 2014 󰀄