Miles began playing the cello when he was 4 years old. At 19 years of age, Miles completed his Bachelor of Music Performance with First Class Honours at the Sydney Conservatorium of Music, having studied under Julian Smiles. Miles has also been taught by Fred Sherry, Tamas Varga, Timothy Walden, Hannu Kiiski, and Howard Penny, Wolfgang Emanuel Schmidt, Phillip Muller, Umberto Clerici, and Kasia Hans.
Miles has performed as a soloist and chamber musician at the Canberra International Music Festival, the Four Winds Festival, and has toured for Musica Viva. In 2019, Miles was the recipient of the 1st price at the Gisborne International Music Competition.
Miles is a Causal Cellist with Opera Australia, and the Sydney Symphony Orchestra, and he was a Sydney Symphony Orchestra Fellow for 2020 and 2021.