Triston Simpson was born in Ventura County (California, USA). He began his training at the age of 10 years at the Bobbies School of Performing Arts and took classes in all styles of dance. In 2016 he took part in the Youth America Grand Prix in New York City where he reached the finals and won a scholarship for the Houston Ballet Academy. There he continued his ballet training from 2016 to 2018. Subsequently he came to the John Cranko Schule Stuttgart from which he graduated in 2020.
In the 2020/21 season Triston Simpson is an apprentice with the Stuttgart Ballet.