Eric Crees was appointed Section Principal Trombone of the Orchestra of the Royal Opera House, Covent Garden in 2000, leaving in 2020. Before that he spent twenty-seven years at the London Symphony Orchestra, twenty as Co-Principal Trombone. He is also a noted brass conductor, composer, arranger and teacher, having taught at the Guidhall School of Music and Drama since 1977, receiving Conferment to Professor in 2014. In the same year he was awarded the International Trombone Society's 'Neill Humfeld Award for Teaching Excellence.'