William James Perry (born October 11, 1927) is an American mathematician, engineer, businessman, and civil servant who was the United States Secretary of Defense from February 3, 1994, to January 23, 1997, under President Bill Clinton. He also served as Deputy Secretary of Defense (1993–1994) and Under Secretary of Defense for Research and Engineering (1977–1981). Perry is the Michael and Barbara Berberian Professor (emeritus) at Stanford University, with a joint appointment at the Freeman Spogli Institute for International Studies and the School of Engineering. He is also a senior fellow at Stanford University's Hoover Institution. He is the co-founder of the Palo Alto Unitarian Church and serves as director of the Preventive Defense Project. He is an expert in U.S. foreign policy, national security and arms control. In 2013 he founded the William J. Perry Project, a non-profit effort to educate the public on the current dangers of nuclear weapons.Perry also has extensive business experience and serves on the boards of several high-tech companies. He was elected a member of the National Academy of Engineering in 1970 for contributions to communications theory, radio propagation theory, and computer technology in the design of advanced systems. He is also a fellow of the American Academy of Arts and Sciences. Among Perry's numerous awards are the Presidential Medal of Freedom (1997) and the Grand Cordon of the Order of the Rising Sun (2002), awarded by Japan. Source: Wikipedia (en)