Overview
Exceptional client service, creative thinking, problem solving, and decades of proven success. These are the hallmarks of Umberg Zipser LLP. Our clients face difficult and complex issues — issues that may threaten their key assets or ventures, their most valuable people, their reputations, or even their ongoing viability. We bring the expertise, ingenuity, and experience to deliver the results they seek, with the efficiency and flexibility they need.
We never lose sight of our client’s objectives, and work creatively to achieve them. Our clients come to us because we deliver the highest quality work product together with unparalleled service. Collectively, we have tried countless cases to successful verdict. But trial isn’t always the right answer. Our pretrial strategies, successful motion practice, and extensive alternative dispute resolution experience enable us to achieve superb results without a trial, and even keep litigation from occurring against our clients. With big-firm experience and small-firm efficiencies, along with an established record of trial and litigation success, we are equally adept at handling the multi-party, complex case as well as more limited and specialized matters where the utmost efficiency is required.
Our attorneys are recognized experts in a wide array of practice areas, including business litigation, intellectual property, class actions, trade secrets, real estate, and white collar criminal defense. Indeed, our peers and the legal community continue to recognize our accomplishments, as we have multiple awards across a variety of organizations and publications. The firm’s lawyers are consistently named as Best Lawyers in America® and Super Lawyers®. Last 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. At Umberg Zipser, we pride ourselves on our ability to handle a wide variety of matters for a diverse client base. We know that clients’ needs differ from client to client, and matter to matter. In response to these needs, we offer a range of flexible billing arrangements that promote efficiency and predictability. Our client focus, devotion, and flexibility have enabled us to maintain client relationships that span decades.
We are strong believers in giving back to our profession and our community – in actions, and not just words or dollars. Our lawyers are actively involved as leaders of multiple professional, pro bono, and charitable organizations, as well as governmental positions.
We never lose sight of our client’s objectives, and work creatively to achieve them. Our clients come to us because we deliver the highest quality work product together with unparalleled service. Collectively, we have tried countless cases to successful verdict. But trial isn’t always the right answer. Our pretrial strategies, successful motion practice, and extensive alternative dispute resolution experience enable us to achieve superb results without a trial, and even keep litigation from occurring against our clients. With big-firm experience and small-firm efficiencies, along with an established record of trial and litigation success, we are equally adept at handling the multi-party, complex case as well as more limited and specialized matters where the utmost efficiency is required.
Our attorneys are recognized experts in a wide array of practice areas, including business litigation, intellectual property, class actions, trade secrets, real estate, and white collar criminal defense. Indeed, our peers and the legal community continue to recognize our accomplishments, as we have multiple awards across a variety of organizations and publications. The firm’s lawyers are consistently named as Best Lawyers in America® and Super Lawyers®. Last 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. At Umberg Zipser, we pride ourselves on our ability to handle a wide variety of matters for a diverse client base. We know that clients’ needs differ from client to client, and matter to matter. In response to these needs, we offer a range of flexible billing arrangements that promote efficiency and predictability. Our client focus, devotion, and flexibility have enabled us to maintain client relationships that span decades.
We are strong believers in giving back to our profession and our community – in actions, and not just words or dollars. Our lawyers are actively involved as leaders of multiple professional, pro bono, and charitable organizations, as well as governmental positions.
Rankings
Regional
Orange County
Tier
1
Orange County
Bet-the-Company LitigationTier
1
Orange County
Commercial LitigationTier
1
Orange County
Litigation - Banking and FinanceTier
1
Orange County
Litigation - Intellectual PropertyTier
1
Orange County
Litigation - Real EstateTier
1
Orange County
Trademark LawHighlighted Client Comments
These featured testimonials reflect a sampling of client experiences. As every legal matter is unique—comments are personal opinions, not guarantees of future results.
Commercial Litigation
I appreciate Umberg Zipser's quick responses and work to keep the cost down.
Doug Wead
Commercial Litigation
Umberg Zipser provides excellent service.
David Harshman
Toshiba America Information Systems, Inc.Commercial Litigation
We have found Umberg Zipser to be thorough, diligent and technologically savvy.
Commercial Litigation
Umberg Zipser attorneys are excellent, timely and made a painful experience much easier.
Doug Wead
Commercial Litigation
Umberg Zipser is a fantastic firm. They are substantively outstanding, but also know the local bench and bar.
Dan Sasse
Partner – Crowell & MoringCommercial Litigation
I was co-counsel with Umberg Zipser in a litigation for the State Controller's Office of the state of California. They did first-rate work.
Phillip Kaplan
Partner – Manatt, Phelps & Phillips, LLPCommercial Litigation
Umberg Zipser is the cream of the crop for litigation and does it in a cost-effective manner.
Bryan Smith
Commercial Litigation
Upon retention of Umberg Zipser, under the guidance and leadership of partners Dean Zipser and Carole Reagan, immediately analyzed the salient facts and controlling law, developed a cogent theory of the case, and implemented an aggressive course of action. Throughout the approximately seven month period that the firm represented CalVet, I, along with my colleagues in the Department's Farm & Home Division, were universally impressed by Mr. Zipser's and Ms. Reagan's responsiveness, keen insight, unwavering courtesy, candor, unassailable honesty, and unimpeachable integrity. I would not hesitate for one moment to retain Umberg Zipser and any of its attorneys to represent CalVet in any form of litigation.
Todd Irby
Placer County Superior CourtRankings
Regional
Orange County
Tier
1
Orange County
Bet-the-Company LitigationTier
1
Orange County
Commercial LitigationTier
1
Orange County
Litigation - Banking and FinanceTier
1
Orange County
Litigation - Intellectual PropertyTier
1
Orange County
Litigation - Real EstateTier
1
Orange County
Trademark LawTier
2
Orange County
Copyright LawTier
2
Orange County
Litigation - SecuritiesTier
2
Orange County
Professional Malpractice Law - PlaintiffsTier
3
Orange County
Litigation - PatentPractice Areas
Umberg Zipser LLP has been ranked by Best Law Firms for excellence in 10 specialties, reflecting the firm's commitment to delivering outstanding legal services.
Additionally, the firm provides services in these practice areas:
- Commercial Litigation
- Criminal Defense: White-Collar
- Ethics and Professional Responsibility Law
- Government Relations Practice
- Legal Malpractice Law - Defendants
- Litigation - Banking and Finance
- Litigation - Construction
- Litigation - Environmental
- Litigation - Intellectual Property
- Litigation - Labor and Employment
- Litigation - Real Estate
- Patent Law
- Trade Secrets Law
- Trademark Law
Individuals Recognized in The Best Lawyers in America®
Umberg Zipser LLP proudly has 10 lawyers recognized for their outstanding professional performance in the 2025 edition of The Best Lawyers in America®. This peer-reviewed honor highlights individual excellence and directly qualifies the firm for consideration in the prestigious Best Law Firms rankings. For over four decades, Best Lawyers has been the gold standard for recognizing top legal talent, serving as the cornerstone for Best Law Firms awards. Learn more about our rigorous Best Lawyers research and selection process.
Client Comments
A strong relationship between a client and their law firm is key to achieving the best possible outcomes. Open communication, trust, and collaboration ensure that attorneys understand each client’s unique goals and needs. Choosing the right firm means finding a team with the experience, knowledge, and dedication to guide you through every stage of the legal process.
Client comments reflect personal opinions and individual experiences. Every case is different, and outcomes depend on specific facts and circumstances. Past results and testimonials do not guarantee similar outcomes in future matters. For personalized legal advice, consult directly with an experienced attorney who can evaluate your specific situation and provide tailored guidance.