Marc B. Koenigsberg is a business litigator representing clients in both state and federal court. He concentrates his practice on commercial litigation, employment law and ADA defense. He provides experienced counsel in administrative, trial and appellate proceedings.

Marc has also represented clients in whistleblower retaliation, sexual harassment and racial discrimination lawsuits, and has defended more than 100 ADA accessibility cases for both public and private entities, as well as compliance counseling on ADA Titles II and III, and related state laws. He is an experienced trainer with the firm's Training Workshop, and has trained both management and rank-and-file employees in harassment and discrimination avoidance.

Marc represents clients in matters brought by the California Air Resources Board alleging products with excess volatile organic compound (VOC) emissions, and matters filed by local district attorneys’ offices alleging violations of consumer protection laws.