Landau entered the United States Army in November 1942. After graduating from Officer's Candidate School, he served as Military Intelligence Officer in the European Theater of Operations. He left active duty status as a captain in Military Intelligence in 1947 but remained in the United States Army Reserve until 1975, when he retired with the rank of colonel. Among his decorations are the Army Commendation Medal and the Meritorious Service Medal. Landau served in private business as an executive of a shipping company from 1947 to 1955, and as general manager of an American automobile distributor in Colombia from 1955 to 1957.
Diplomacy
In 1957, he began his career in the United States Foreign Service as commercial attache and Chief of the Economic Section in Montevideo, where he also served as member of the U.S. Delegation that created the "Alliance for Progress" in Punta del Este in 1961. From 1962 to 1965, he was political officer, then Deputy Chief of Mission in Madrid, and attended the Canadian Forces College from 1965 to 1966. He was Country Director of the Office of Spanish and Portuguese Affairs in the Bureau of European and Eurasian Affairs from 1966 to 1972. He was Ambassador to Paraguay from 1972 to 1977 and Ambassador to Chile from 1977 to 1982. From January to April 1982, he served as executive director of the Presidential Commission on Broadcasting to Cuba. President Ronald Reagan appointed him to be Ambassador to Venezuela, and he served from 1982 to 1985. Landau received the State Department's Superior Honor Award for his work in the negotiation of the 1970 Spanish Base Agreement. He also was the action officer in concluding the renewal of the Azores Basing agreement with Portugal in 1972. He was awarded the Presidential Meritorious Service Award in 1984 and has been decorated by the Governments of Argentina, Chile, Colombia, Paraguay, Peru and Venezuela. Ambassador Landau left the Foreign Service in 1985 to become president of the Americas Society. He retired in 1993. Landau also served as chairman of the Latin Advisory Board of Coca-Cola and of Guardian Industries, a major float glass manufacturer with several plants in Latin America. He was on the board of the Emigrant Bank from 1967 to 2005, and on the advisory committee of the Export–Import Bank of the United States in 1991 and 1992. Landau spoke fluent German and Spanish.
