Mr. Hahn is a principal at OFW Law. He advises companies and trade associations on compliance with Food and Drug Administration law and regulations, with a primary focus on foods. The core of his practice consists of advising food and dietary supplement companies – including manufacturers, processors, distributors, and retailers – on labeling and advertising, formulation, import/export, Bioterrorism Act and food defense, inspection, recall, and enforcement matters.

Mr. Hahn also practices health care law, with a focus on the Medicare program. He joined the firm in 1998 after serving for several years as Director of Legal Affairs at the consumer group Public Voice for Food and Health Policy (now merged with the Consumer Federation of America). Prior to that, he worked in Guangzhou, China with the U.S. law firm Lewis, D'Amato, Brisbois, Bisgaard, Buxbaum & Choi (now Lewis Brisbois Bisgaard & Smith LLP). He is proficient in Mandarin Chinese.

Mr. Hahn was born in New Hyde Park, New York and graduated magna cum laude, Phi Beta Kappa from Brown University in 1980. He earned his J.D. from Columbia University Law School in 1984 and a master's degree in public health from the Harvard School of Public Health in 1994. Mr. Hahn was admitted to the New York State Bar in 1985 and the District of Columbia Bar in 2001. He is currently a member of the New York and District of Columbia Bars.