Mr. Hahn received his B.A. degree with honors from the University of Pennsylvania in 1971, his law degree from the University of Pennsylvania Law School in 1974 and his LL.M. from Columbia Law School in 1980. After serving as a law clerk for Judge Harry Hupp, Mr. Hahn joined the legal department of Atlantic Richfield Company where he worked in the commercial and international areas. He then taught courses on corporate law and Japanese law at California Western School of Law in San Diego from 1980 - 1985. During that time, he also lectured on U.S., Japanese, and Chinese law in Japan, Hong Kong, Taiwan, and South Korea. In private practice in Los Angeles since 1985, Mr. Hahn has concentrated on representing foreign companies in their U.S. operations, U.S. companies doing business in Asia and Mexico and foreign banks doing business in the U.S. Mr. Hahn has served as Chair of the Executive Committee of the International Law Section of the State Bar of California, the Pacific Rim Committee of the Los Angeles County Bar Association (on two separate occasions), and the International Law Section of the Los Angeles County Bar Association. A proficient author and extensive lecturer on international trade, Mr. Hahn was the international law editor for The California Business Law Reporter. In addition to his practice, Mr. Hahn has served as an adjunct professor at University of Southern California Law School, Pepperdine Law School, and Southwestern Law School, teaching courses on commercial law as well as international business law. His book Japanese Business Law and the Legal System was published by Greenwood Press. Mr. Hahn was recognized as an “outstanding international lawyer” by his selection in 2002 to be an initial member of the Congress of Fellows of the Center for International Legal Studies.
In 2009 he was elected First Vice President and member of the Board of Directors of the AEA International Lawyers Network, a prestigious international association of law firms, and he has been reelected to both positions each year thereafter. Mr. Hahn was selected for inclusion in Who’s Who in America 2011. In each of Fall 2012, 2013, 2014 and 2015, Mr. Hahn was named in The Los Angeles Times as one of Southern California’s top rated lawyers. Mr. Hahn has been rated by Martindale-Hubbell, the foremost rater of U.S. attorneys, a Preeminent Attorney, its highest rating and was named by American Lawyer Media and Martindale-Hubbell as a 2013 Top Rated Lawyer in Labor and Employment Law. He was named by Corporate Intl Magazine as the 2014 Corporate Transactional Attorney of the Year and by The Legal Network in 2016 as one of the “Top Lawyers in California”.