- Secretary of Energy, Energy Secretary - the person who holds the secretaryship of the Department of Energy; "the first Secretary of Energy was James R. Schlesinger who was appointed by Carter"
--1 is a kind of secretary
- Secretary of Energy, Energy Secretary - the position of the head of the Department of Energy; "the post of Energy Secretary was created in 1977"
--2 is a kind of secretaryship
--2 is a member of United States Cabinet, US Cabinet