Hugo Gittens began competing in earnest as a lightweight weightlifter in 1958 and won his first national title two years later. At the 1963 Pan American Games, he came in fifth, and he first represented Trinidad and Tobago at the Olympics in 1964, where he placed 11th. Two years later, he had his greatest triumph when he won his division at the British Empire and Commonwealth Games, also coming in third at the Central American and Caribbean Games that same year. He won silver at the 1967 Pan American Games and then returned to the Olympics in 1968, this time placing 16th. His final major international tournament was the 1970 British Commonwealth Games, where he just missed a medal in fourth. He was inducted into the National Sports Hall of Fame in 1985.