For more than 25 years, James Aiosa has represented clients in national and international complex toxic and mass tort litigation, including in state and federal class actions, multi-district litigation, and appeals, involving military, commercial/agricultural, and consumer products and associated chemical compounds.

Jim has deep case management experience, serving as lead coordinating counsel in litigation involving chemical exposures, environmental contaminants, herbicides, pesticides, and fungicides, as well as other chemicals, compounds and products considered persistent, bioaccumulative, and toxic.

Jim has also represented large commercial insurance companies in toxic tort, environmental, product liability, and property damage matters, including cases involving PCBs, TCE, asbestos, and tobacco, as well as employment discrimination class action claims.

Serving as lead counsel, Jim has had extensive involvement in a range of complex mass tort and class action products liability litigation, both foreign and domestic, involving military, consumer, and commercial/agricultural products containing dioxins and furans, hexachlorobenzene (HCB), pentachlorophenol (PCP), arsenic, cacodylic acid, and other organic arsenicals. He has defended chemical product manufacturers against claims involving cancers, endocrine-related disorders, neurological complaints, neurodevelopmental deficiencies and other alleged multi-generational effects, pulmonary and cardiovascular diseases, diabetes, fear of future diseases, and medical monitoring. Jim also has prodigious experience in developing the legal and scientific responses to such claims, including those for medical monitoring and future medical surveillance.

Jim has played an integral role in the development of his clients’ medical and scientific defenses and trial strategies relating to these issues, including the identification and development of medical and scientific expert witnesses and associated arguments and evidence. In the course of his efforts, Jim has worked closely with a range of world-class scientists and clinicians to apply efficiently and effectively principles of toxicology, epidemiology, risk assessment, and biostatistics, in the defense of his clients. Jim also has extensive experience addressing the complex procedural and jurisdictional issues, obstacles, and opportunities frequently presented by complex toxic tort litigation, particularly those venued internationally, including by developing and executing effective strategies for addressing such challenges and controversies both pre-and-post-litigation.

Jim has written extensively on complex/mass tort and related issues, and his articles have appeared in such publications as Mass Torts, LJN’s Product Liability Law & Strategy, DRI – The Voice of the Defense Bar, among other media. Jim serves on the Adjunct Board of Advisors of the US-Korea Law Foundation and was formerly an appointed member of the Nassau County Asian American Economic Advisory Commission.

  • Prior to joining Orrick, Jim also served as Assistant District Attorney of Queens County (appointed by The Honorable Richard A. Brown) and Principal Law Clerk to The Honorable Charles E. Moylan, Junior, Senior Judge, Maryland Court of Special Appeals.