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Aaron D. Costa

Aaron D. Costa

Senior Counsel

Aaron draws on twenty years of experience in asbestos litigation as he guides clients in national strategies.

Aaron pursued a career in litigation out of a love for its intellectual challenge: he excels at constructing arguments and thinking on his feet. Although he first worked on insurance defense and landlord/tenant matters, he soon found himself representing clients in toxic tort cases and discovered the field was a perfect fit thanks to his own background. Aaron comes from a family of pipefitters, and he himself worked as an auto mechanic for a decade as a teen and young adult. His history meant that he understood not only the law, but the dangers of asbestos exposure, the plaintiffs’ perspective, and the mechanics of much of the work performed in client companies.

Today, Aaron serves on the national coordinating counsel team for a multinational conglomerate corporation, assisting with the development of nationwide asbestos and toxic tort strategies. He oversees cases from intake to resolution, whether at trial or through settlement negotiations, and he is particularly experienced defending clients in notoriously difficult jurisdictions.

Aaron places great importance on understanding the full context of a case and the plaintiff’s argument before working backward to develop potential defenses. Known for his empathy and attention to the details of a client’s situation, Aaron’s goal is always to help clients move forward.




  • J.D., University of California College of the Law, San Francisco
  • B.A., San Francisco State University


  • California
  • U.S. District Court, Central District of California


  • German, proficient

*Contact Aaron to set up an in-person consultation by appointment in the Oakland office.
  • Serve on national coordinating counsel teams for multinational companies with large litigation portfolios.
  • Represent clients as first and second chair at trial.
  • Seasoned deposition examiner with extensive experience in witness preparation.
  • Manage cases from intake to resolution.
Outside the Office

Aaron is an avid motorcyclist who will ride absolutely anywhere, as well as a remote-control enthusiast who loves flying multirotors and planes.

Aaron also enjoys spending time with his teenage son and with his dog, a slightly neurotic Doberman.