[4] From 1982 to 1993, Lawson was a Lay Clerk in Salisbury Cathedral Choir under Richard Seal and from 1989 was Director of Music of Chafyn Grove Preparatory School.
In June 1993, Lawson successfully auditioned for the part of second baritone with The King's Singers, replacing founder-member Simon Carrington.
[5] He has 10 arrangements on the group's Grammy winning album "Simple Gifts", recorded in 2008 at the studio of Status Quo lead guitarist Francis Rossi.
[citation needed] He spent ten years on the staff of the Vocal Department of Wells Cathedral specialist music school.
In 2014 and 2016, he was one of two lecturers at the European Seminar For Young Composers held in Aosta, Italy, sponsored by the Italian national choral foundation Feniarco, and by Europa Cantat.