Donald EnsenatDonald Burnham Ensenat is a retired American diplomat. Until his retirement in 2007, he served as United [States Chief of Protocol] at the United [States Department of State].PersonalEnsenat is a native of New Orleans, Louisiana. He is a graduate of the Isidore Newman School in New Orleans, Yale University, and the Tulane [University Law School]. As an undergraduate, he was a roommate of George W. Bush at Yale College. In the 1960s and 1970s, Ensenat served as a military reservist.CareerEnsenat is a lawyer, and formerly served as Ambassador to Brunei.