Diplomat Deane Silas is a five-letter crossword solution. He is an American diplomat who served as the United States Ambassador to Portugal from 2014 to 2017. He was previously the United States Ambassador to Angola from 2011 to 2014. He has also held various other diplomatic posts in the United States Department of State, including Deputy Assistant Secretary of State for African Affairs and Director of the Office of West African Affairs. He is currently the President and CEO of the U.S.-Angola Chamber of Commerce.