Thomas became Organist at St Margaret’s in 1982. A year later he was appointed Birmingham City Organist where he presents a series of organ concerts at the City’s Town Hall and Symphony Hall. In 2002 he won the Royal Philharmonic Society Instrumental award and he received honorary Doctorates from both of Birmingham’s Universities in 2003 and 2006. In 2012 he was named Performer of the Year by the New York Chapter of the American Guild of Organists and in 2016 he was awarded the Medal of the Royal College of Organists. Thomas has toured on four continents, and has played at many International Festivals such as Bath, Salzburg, Edinburgh and the Proms. He regularly inaugurates new instruments both at home and abroad, and he has recorded for Hyperion, Chandos, Regent, EMI and Decca.
In November 2020 he was awarded The Queen's Medal for Music.