When the test scores came out, Lucas Siqueira, 27, was really excited. His high mark on the Foreign Service exam earned him a coveted position at Brazil's highly competitive Ministry of Foreign Affairs.
"They hire 30 diplomats a year and thousands of people sign up," he says in fluent English from his home in the capital Brasilia.
It was, he says, a great day.
Siqueira considers himself to be mixed race, known in Brazil as pardo, or brown.