He was born in the United States and raised in Six Mile Bottom, England.

He traveled a lot in his youth when his father served as instructor on U.S. military bases.

He started competing in triathlon aged 10[1] and placed 37th at the 2016 Rio Olympics.

[3] Billington followed it up by returning to triathlon as a guide to Brad Snyder at the Paratriathlon PTVI category, winning the 2020 Summer Paralympics gold, as sighted guides are eligible for medals.

[4] Billington won the 2022 Burning Man Ultra (50K) with a time of 3:13:58.