Grunfeld, Desiderio, Lebowitz, Silverman & Klestadt (GDLSK) LLP is one of the nation's largest law firms devoted exclusively to international trade and customs matters. Mr. Murphy has more than 25 years experience in complex customs and trade matters. Mr. Murphy is a licensed US Customs Broker, a Certified Customs Specialist and an Accredited Zone Specialist (through the National Association of Foreign Trade Zones). Since 1995, he has taught a twice-yearly review course to assist individuals in preparing for the licensing examination for Customs brokers.