About the Firm

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Our Practice

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Our Attorneys

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About the Firm

The firm was founded in 2003 and has offices in the financial district of downtown San Diego. Its shareholder, Audie de Castro, previously worked for a larger corporate law firm. He founded his own firm so that he could offer much more personalized services at reasonable rates. We have a business approach to practicing law. We learn our clients’ businesses and listen to their needs. Our focus on the specific needs of clients helps us achieve legal and business success for them cost-effectively. That is why we have been retained to represent private and publicly traded companies, domestic and international. We have represented clients in the United States and other countries, including Canada, China, Germany, the Philippines and the UK. Audie de Castro is the Philippine Honorary Consul of San Diego.

We have represented domestic and international clients on a regular basis over many years. We advise them on day-to-day business matters as corporate counsel. We have successfully negotiated and closed complex, multi-million dollar deals. Some of our key business practice areas include corporate governance, limited liability company laws, securities offerings and compliance, mergers & acquisitions, commercial real estate, licensing and distributorships, and business agreements.

Our clients trust us to represent them when they are involved in major disputes, no matter the opponent. We have successfully handled contentious and high stakes litigation in state and federal courts, including cases involving breach of contract, breach of fiduciary duty, shareholder and partnership disputes and arbitration, fraud, securities, franchise, real estate, and other commercial disputes. We advise our clients to be practical about resolving disputes. But we will vigorously litigate disputes when it makes business sense to do so, including going to trial.

Our Practice

We are a full-service business and civil law firm. We successfully handle both transactional and litigation matters for businesses, entrepreneurs, investors, and individuals.
We practice in the following areas:


  • Breach of Contract
  • Fraud
  • Breach of Fiduciary Duty
  • Corporate Governance
  • Shareholder and Partnership Disputes
  • Franchise Disputes
  • Real Estate Disputes
  • Securities
  • Employment
  • Negligence


  • Contract Review
  • Entity Structuring and Formation,
    including Corporations, LLCs and LPs.
  • Corporate Governance
  • Securities Offerings, Public and Private
  • Securities compliance
  • Rule 144 transactions
  • Mergers & Acquisitions
  • Commercial Loan Financing
  • Commercial Real Estate Acquisition and Leasing
  • Licensing and Distributorships

Our Team

Audie J. de Castro

Audie de Castro practices in business litigation and transactional law. He started his career working on high stakes estate and trust litigation in San Francisco and then joined a larger corporate law firm in San Diego. He has extensive experience in litigating business, corporate, real estate and investment matters, including fraud or misrepresentation, breach of fiduciary duty, securities, franchise disputes, accounting, and breach of contract claims. He has obtained large settlements and has won trials.

A former CPA, Mr. de Castro is also a successful transactional attorney. He has closed complex and large transactions, such as mergers and acquisitions, securities offerings, franchising, licensing, distributorships, and commercial real estate deals. He has represented public and private companies.

As the Honorary Consul of the Republic of the Philippines he serves over 200,000 constituents as the official Philippine representative in San Diego County. He is also the President of the San Diego Consular Corps.

Mr. de Castro is prominently involved in civic affairs. He previously served on the Board of Governors for the San Diego Foundation. He is also past President of the Asian Business Association of San Diego and the Filipino-American Lawyers of San Diego. He is a graduate of LEAD San Diego (2003). Mr. de Castro has received numerous awards for his community service, including from the Asian Business Association of San Diego (2016), San Diego County Bar Association (2015), and Asian Pacific American Coalition (2014).

Mr. de Castro graduated cum laude from the University of San Francisco School of Law. He was a senior staff member of the University of San Francisco Law Review and McAuliffe Honor Society (top 10%). He is admitted to practice in all California state courts, the U.S. District Courts in the Northern, Southern and Central District, and the 9th Circuit Court of Appeals. He received a B.B.A. in Accounting from the University of San Diego and has a Certified Public Accounting license (inactive).

He is a member of the San Diego County Bar Association, the American Bar Association, and the American Health Lawyers Association.

Mr. de Castro teaches Business Associations as an Adjunct Professor of Law at Thomas Jefferson School of Law.


John Mayer

Mr. Mayer received his Bachelor of Arts degree from the University of California, Santa Barbara in 1994 and graduated cum laude from Thomas Jefferson School of Law in 1998, where he was a member of the Thomas Jefferson Law Review. After passing the bar, he practiced with the mid-sized law firm Hayes Simpson Greene LLP until late 2001, when he started his own practice. Since then, he has practiced with a partner and as a solo practitioner, and established John R. Mayer, APLC in 2005.

Mr. Mayer has represented plaintiffs and defendants in a vast array of lawsuits, including business disputes, real estate matters, personal injury cases, investor claims, and probate cases. Mr. Mayer has also represented businesses and individuals in transactions, collection matters, pre-lawsuit negotiations, and appeals.

For several years, Mr. Mayer acted as president and a director for San Diego Teen Court, Inc., a non-profit peer sentencing program for first-time juvenile offenders. Mr. Mayer also worked for a time as COO and General Counsel for TV Magic, Inc., an audio-video systems integration company, and still serves on TV Magic’s Board of Directors. He is Of Counsel to the firm.

Amanda Benedict

Ms. Benedict is an experienced litigator and appellate advocate. Ms. Benedict's litigation practice has included both defense and plaintiff representation in a variety of practice areas including, business litigation, automobile liability, premise liability, professional liability and admiralty. Working on behalf of plaintiffs and defendants, Ms. Benedict possesses a unique objective view of legal issues and how to effectively approach litigation.

As an appellate advocate, Ms. Benedict has represented clients before the California Court of Appeal, the California Supreme Court and the U.S. Court of Appeals for the Ninth Circuit. Ms. Benedict has also successfully obtained Certiorari review of a criminal matter at the United States Supreme Court. Ms. Benedict has authored in excess of 300 appellate briefs in a wide range of matters including maritime, criminal, professional liability, corporate, Longshore, personal injury, civil rights and family law.

Ms. Benedict is admitted to practice in all courts in the State of California, the United States Federal District Courts in the Southern, Central and Northern Districts of California, the United States Court of Appeals for the Ninth Circuit and the United States Supreme Court. She has been honored for her advocacy by Super Lawyers Magazine as being among the top five percent of lawyers in San Diego in 2011, 2014 - 2020.

Ms. Benedict was born in Quincy, Massachusetts. She received her Bachelor of Arts degree in Law & Society from the University of California, Santa Barbara in 1992, and was a member of their NCAA women's soccer team. Ms. Benedict obtained her Juris Doctor in 1998 from the University of San Diego School of Law.

When not practicing law, Ms. Benedict loves the San Diego outdoors. Ms. Benedict has successfully completed an Ironman triathlon and several half Ironman triathlons. Ms. Benedict remains active in soccer, golf, and sailing.


Lorena Dominguez

A native San Diegan from South Bay, Lorena has been in the legal field for the past fifteen years. Having worked for de Castro, P.C. for the last eleven years, Lorena Dominguez is the firm’s office administrator and legal assistant to Audie J. de Castro. She works closely with Mr. de Castro to oversee daily administrative and financial operations of the firm, as well as providing legal support. She is professionally well rounded and has excelled in various professional roles. Lorena Dominguez also works for the Philippine Consulate of San Diego, serving as the administrator of the office. Lorena loves spending time with her husband and her three young children. She is very active in her children’s school affairs, serving as a Parent Ambassador and Room Parent for St. Charles Catholic School and as a past member of the PTA. During her free time, she enjoys family movie nights at home. She is fluent in Spanish.


Contact Information

We are centrally located within the financial district of downtown San Diego. We are on the 17th floor of the Bank of America Building. Our offices are within walking distance of Federal and State courthouses. Our contact information is below: 701 B Street, Suite 1745
San Diego, California 92101
Phone: (619) 702-8690
Facsimile:(619) 702-9401

If you wish to contact us, please email us at adecastro@decastropc.com and we will respond to you shortly. If this is an urgent matter, please call us directly at (619) 702-8690.