He played the Engineer in the original casts in the West End revival of Miss Saigon in 2014, for which he was nominated for the Laurence Olivier Award for Best Actor in a Musical, and reprised the part on Broadway in 2017.
While an engineering student in the Philippines, Briones became involved with the original 1989 London production of Miss Saigon.
[3] He has been involved with various touring productions of Miss Saigon, as a swing and covering other roles, finally playing the Engineer.
In 2014 he joined the original cast of the Miss Saigon West End revival, playing the Engineer.
"[11] In 2018, he appeared in The Assassination of Gianni Versace: American Crime Story as Modesto Cunanan, father of Gianni Versace's murderer, Andrew Cunanan, and in American Horror Story: Apocalypse as Ariel Augustus.