After high school, took a short business course in Miami, Florida, and then, in 1933, moved to Washington, District of Columbia to live with an aunt. During this time, worked at the Home Owners" Loan Corporation and later the Pan American Union during the day and took classes at Georgetown University at night. At the Pan American Union, he worked in the division of financial and economic information, specializing in economic information about Latin America.
After college, took a job with the Trade Agreements Division of the United States Department of State in 1941.
His work initially focused on United States. trade with Peru and Mexico. He then worked with State Department lawyer Marc Catudal, an expert on the most favored nation clause, on the legal framework for trade agreements.
After World World War II, worked with the Trade Agreements Committee, an interagency committee that was involved in developing United States. postwar trade policy, in particular the negotiation of the General Agreement on Tariffs and Trade and the creation of the International Trade Organization in 1947. He worked at the Department of State on trade issues until 1958.
He then spent a few years at The Fletcher School of Law and Diplomacy.
In 1961, President of the United States John F. Kennedy named as Assistant Secretary of the Treasury for International Affairs. On October 2, 1962, President Kennedy appointed as United States Ambassador to the Organisation for Economic Company-operation and Development. Held this post until June 15, 1965.
President Lyndon B. Johnson nominated him as Assistant Secretary of State for European Affairs in 1965, with holding this office from June 16, 1965, until February 19, 1969.
Publications by, "General Agreement of Tariff and Trades—A Cohesive Influence in the Free World", Journal of Farm Economics (May 1958) and Janet L., "The United States, the European Community, and Prospects for a New World Economic Order", Law & Contemporary Problems (Spring 1972).