The Master of Music of Brentwood Cathedral is Andrew Wright, former Assistant Master of Music at Westminster Cathedral. He was appointed in 1982 and is also Director of Diocesan Music. He founded the Cathedral Choir in 1984 and over the years the Choir has expanded from the original Boys' Choir of some thirty voices, to its present membership which includes the Choir Ladies and Gentlemen, together with the Cathedral Lay Clerks. The Cathedral also has over ten boy choristers and over twenty girl choristers which the assistant music director, Art Wangcharoensab, directs and runs.