
- 9Experienced
- 9Responsible
- 9Excellent Service
A customer service focused approach to litigation

- 9Experienced
- 9Responsible
- 9Excellent Service
A customer service focused approach to litigation
Experience You Can Trust

O’Brien Law handles a broad spectrum of matters. On the general counsel front, the firm represents corporations throughout the state with their general day-to-day matters, including contract review, employment advice, litigation matters and other issues which arise in the normal course of business.
Our successes have resulted in the firm growing from 2 attorneys to 10 attorneys statewide in just 5 years.
- O'Brien Law believes its first responsibility is to serve its clients.
- Our case reporting standards are seconde to none.
- Our attorneys are available whenever you need them.
- Our response time is unparalleled.
- The initial consultation is just the beginning for us as the client is integral to the process.

How can we help you
Practice Areas

Construction Litigation
Construction defect litigation represents a large portion of O’Brien Law P.C. Practice. We represent clients involved in all aspects of construction litigation, including insurance companies, businesses, general contractors, subcontractors, developers, lenders, bond and surety companies, design professionals, and suppliers of materials.
Commercial Litigation
Whether your business is the plaintiff or defendant, the outcome of a commercial litigation matter can have permanent consequences for your company. We understand the importance of these cases and know how to develop effective strategies for commercial clients. Throughout California we provide individualized advice and advocacy to firms in a full range of business fields.
Commercial General Liability Litigation
O’Brien Law P.C. has vast experience assisting insurance companies with their general liability claims needs. We work with a number of insurance companies, third party administrators, and directly with companies to assist with these matters.
Wrongful Death
O’Brien Law P.C. handles numerous wrongful death claims each year. These matters involve a special expertise in order to be effectively litigated. The issues presented in these matters are often more difficult to investigate and resolve.
Commercial Auto Litigation
O’Brien Law P.C. is a leader in the State representing limos, busses, taxis, trucks and paratransit vehicles. We have extensive experience in all types of commercial auto cases, and have an experienced stable of consultants at our disposal state wide to assist with these matters.
General Counsel Services
O’Brien Law handles a broad spectrum of matters. On the general counsel front the firm represents corporations throughout the state with their general day to day matters, including contract review, employment advice, litigation matters and other issues which arise in the normal course of business.
Insurance Litigation
The insurance law attorneys at O’Brien Law P.C. provide legal advice and representation to insurance companies, corporations, contractors and policyholders throughout California.
Labor & Employment Law
Our firm provides assertive representation to employment and labor law clients throughout the State of California.
Real Estate Litigation
When facing the stress of real estate litigation, retaining an attorney with substantial knowledge about California property laws and civil litigation can lighten the burden.
Trust and Estate Litigation
O’Brien Law P.C. has extensive experience litigating Elder Abuse, Trust and Estate matters, including trials of such matters. We offer deep litigation experience combined with extensive experience litigating complex trust and estate matters.
How can we help you
Practice Areas

Construction Litigation
Construction defect litigation represents a large portion of O’Brien Law P.C. Practice. We represent clients involved in all aspects of construction litigation, including insurance companies, businesses, general contractors, subcontractors, developers, lenders, bond and surety companies, design professionals, and suppliers of materials. [LEARN MORE]
COMMERCIAL Litigation
Construction defect litigation represents a Whether your business is the plaintiff or defendant, the outcome of a commercial litigation matter can have permanent consequences for your company. We understand the importance of these cases and know how to develop effective strategies for commercial clients. Throughout California we provide individualized advice and advocacy to firms in a full range of business fields. [LEARN MORE]
Commercial General Liability Litigation
O’Brien Law P.C. has vast experience assisting insurance companies with their general liability claims needs. We work with a number of insurance companies, third party administrators, and directly with companies to assist with these matters. [LEARN MORE]
Wrongful Death
O’Brien Law P.C. handles numerous wrongful death claims each year. These matters involve a special expertise in order to be effectively litigated. The issues presented in these matters are often more difficult to investigate and resolve. [LEARN MORE]
Commercial Auto Litigation
O’Brien Law P.C. is a leader in the State representing limos, busses, taxis, trucks and paratransit vehicles. We have extensive experience in all types of commercial auto cases, and have an experienced stable of consultants at our disposal state wide to assist with these matters. [LEARN MORE]
General Counsel Services
O’Brien Law handles a broad spectrum of matters. On the general counsel front the firm represents corporations throughout the state with their general day to day matters, including contract review, employment advice, litigation matters and other issues which arise in the normal course of business. [LEARN MORE]
Insurance Litigation
The insurance law attorneys at O’Brien Law P.C. provide legal advice and representation to insurance companies, corporations, contractors and policyholders throughout California. [LEARN MORE]
Labor & Employment Law
Our firm provides assertive representation to employment and labor law clients throughout the State of California. [LEARN MORE]
Real Estate Litigation
Trust and Estate Litigation
O’Brien Law P.C. has extensive experience litigating Elder Abuse, Trust and Estate matters, including trials of such matters. We offer deep litigation experience combined with extensive experience litigating complex trust and estate matters. LEARN MORE]
How can we help you
Practice Areas

Construction Litigation
Construction defect litigation represents a large portion of O’Brien Law P.C. Practice. We represent clients involved in all aspects of construction litigation, including insurance companies, businesses, general contractors, subcontractors, developers, lenders, bond and surety companies, design professionals, and suppliers of materials. [LEARN MORE]
COMMERCIAL Litigation
Construction defect litigation represents a Whether your business is the plaintiff or defendant, the outcome of a commercial litigation matter can have permanent consequences for your company. We understand the importance of these cases and know how to develop effective strategies for commercial clients. Throughout California we provide individualized advice and advocacy to firms in a full range of business fields. [LEARN MORE]
Commercial General Liability Litigation
O’Brien Law P.C. has vast experience assisting insurance companies with their general liability claims needs. We work with a number of insurance companies, third party administrators, and directly with companies to assist with these matters. [LEARN MORE]
Wrongful Death
O’Brien Law P.C. handles numerous wrongful death claims each year. These matters involve a special expertise in order to be effectively litigated. The issues presented in these matters are often more difficult to investigate and resolve. [LEARN MORE]
Commercial Auto Litigation
O’Brien Law P.C. is a leader in the State representing limos, busses, taxis, trucks and paratransit vehicles. We have extensive experience in all types of commercial auto cases, and have an experienced stable of consultants at our disposal state wide to assist with these matters. [LEARN MORE]
General Counsel Services
O’Brien Law handles a broad spectrum of matters. On the general counsel front the firm represents corporations throughout the state with their general day to day matters, including contract review, employment advice, litigation matters and other issues which arise in the normal course of business. [LEARN MORE]
Insurance Litigation
The insurance law attorneys at O’Brien Law P.C. provide legal advice and representation to insurance companies, corporations, contractors and policyholders throughout California. [LEARN MORE]
Labor & Employment Law
Our firm provides assertive representation to employment and labor law clients throughout the State of California. [LEARN MORE]
Real Estate Litigation
Trust and Estate Litigation
O’Brien Law P.C. has extensive experience litigating Elder Abuse, Trust and Estate matters, including trials of such matters. We offer deep litigation experience combined with extensive experience litigating complex trust and estate matters. LEARN MORE]
Results

Years
Attorneys
Jury Trials
Trials & Arbitrations

Long history of successful trials
O’Brien Law has enjoyed a string of successes since opening its doors. While we diligently try to resolve all matters prior to litigation, we also are not afraid to go to court when the opposing party has unreasonable demands.
We employ a number of excellent trial attorneys, who among them have tried over 150 jury trials and over 175 trials and arbitrations of all types. Our attorneys have been successful in auto and truck litigation, premises liability cases, products liability cases, employment litigation, breach of contract and fraud trials, real estate cases, trust cases, construction cases and public entity disputes.
We have recently resolved several cases on the eve of trial by securing dismissals with prejudice of our clients without our clients paying any settlement monies.

Auto Litigation
Most recently, in January of 2023, we tried the matter of Viara vs. Padilla, in Stanislas county. This was a rear end auto accident, and we argued plaintiff did not meet her burden on causation. Amazingly we obtained a defense verdict for our client.
In addition, in September of 2022 we tried the matter of McDougal v. Sanchez, in downtown Los Angeles, a notoriously difficult venue for defendants. This was a complex left turn accident case with an adverse independent witness. Again, we achieved a defense verdict.
While we rarely try auto cases, these were two very difficult cases, both of which turned out well for our clients.

Construction Litigation
In 2020, we defended a concrete subcontractor in the binding arbitration of Franklin v. Plath. The matter involved concrete flooring and flatwork which Claimant alleged was defective in his home. While the arbitrator returned an award in excess of $1,000,000, our client was found to have no liability for the alleged defects.

Commercial Litigation
Daniels vs. Orenstzajn, was a two-week jury trial in San Mateo County completed in 2019.
Plaintiff claimed damages related to the construction of a property line block wall and fence. Plaintiff was seeking in excess of $200,000 in loss of use, contribution, and emotional distress damages. Our client cross complained for trespass.
The jury came back with a defense verdict and a verdict in favor of our client on her cross complaint.

Construction Defect Litigation
Guerrero v. S3 Design Group was a binding arbitration conducted in Santa Clara County in 2018.
The matter regarded alleged construction defects related to claimants’ remodel of their home. The arbitrator returned a defense verdict for our client and granted our clients’ cross-petition for recovery of construction costs not paid.

Public Entity Representation
The matter of the Brooktrails Township vs. The City of Willits was a major dispute in 2017 between two California public entities.
The case involved conducting a forensic audit of the City’s books for 12 years. The total value of the claims was in excess of $10 million. After devastating examination of the City Manager and Finance Director, the city agreed to an extremely favorable settlement.
Our firm has an extensive background in forensic accounting, fraud, and business disputes, which was extremely important to this matter.

Employment Litigation
In the last few years, the firm has become much more involved in employment litigation, which now represents a large portion of work for the firm.
We are currently defending multiple wage & hour class actions and PAGA matters, as well as many individual disputes related to classification, hostile work environment and discrimination.
We continue to achieve excellent results for our clients on these difficult matters.
Attorneys

Top Rated Lawyers Fighting For You!

Patrick O'Brien
Managing Partner

Kathleen Miller
Partner

Steve Pabros
Partner

Caitlin Phair
Partner

James Choo
Senior Attorney

Bridget K. Riley
Senior Attorney

Kharman Aidun
Attorney

Alexander Nguyễn
Attorney
Reviews

I have worked with Pat on a number of matters. We attended mediation recently and, while Pat was my attorney, he ended up taking over the mediation and proposing the ultimate solution as the mediator lacked creativity. I strongly recommend Pat as a mediator for your case!
I have worked with and known Patrick for over 15 years. He is an exceptional attorney and mediator, extremely quick and creative. I recommend him strongly as a neutral for almost any matter.