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Mauro, Archer, O’Neill has a team of skilled attorneys and professionals devoted to providing our clients personal attention and committed to achieving the best results for every case.

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We are devoted protectors and fearless legal advocates. We have and work with some of the nation’s most skilled litigators.

proven track record

We have reached countless favorable verdicts and settlements. We see opportunities where some may only see problems.

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We are ready to fight for you, your family, and your loved ones with everything we have. We won’t stop until we’ve exhausted every option.

Mass Torts

PG&E - North Bay

Initial reports show PG&E equipment was responsible for igniting many of the October wildfires, including the Atlas, Nuns, Redwood, and Pocket Fires. In some cases, CalFire found PG&E in violation of state laws.

PG&E - Camp Fire

The Camp Fire was the deadliest and most destructive wildfire in California history to date. Covering an area of almost 240 sq. miles, it destroyed 18,804 structures, mostly within the first four hours of starting. Total damage is estimated at $16.5 billion.


This potent pesticide has been banned in many states. Children whose mothers had been exposed during pregnancy have shown lower birth weight and reduced I.Q. Farmworkers have also reported loss of memory and other health issues resulting in hospital admissions.

Just for Men®

Just For Men® contains p-Phenylenediamine (PPD), a dark chemical used in their hair dye known to cause health risks. It is believed the amount of PPD used in the Jet Black color shade was approximately 17 times greater than the amount of PPD used in lighter color shades.


Syngenta allegedly sold genetically modified corn seed that China refused to import, causing about 600,000 farmers and other producers across the Midwest to lose billions of dollars.


Plaintiffs allege that, for over two decades, drug makers widely advertised their opioid products as virtually non-addictive, even when prescribed for a patient’s long-term pain management.


Invokana (canagliflozin) is an SGLT2 inhibitor, which is a medication that works by lowering blood glucose levels. For many patients, the use of Invokana triggered side effects so severe they needed hospitalization. Others suffered permanent disability, including amputation.

Dr. Zamora

South Texas rheumatologist Dr. Jorge Zamora-Quezada is charged with misdiagnosing patients so he could support a “lavish” and “opulent lifestyle,” according to the U.S. Justice Department. His unnecessary treatments included chemotherapy drugs and other toxic substances.

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