While many concertgoers and listeners may not quickly recognize the name Thomas Fey, they will find it difficult to avoid it in record stores or on websites that sell classical music recordings. Since the turn of the new century era Fey has been involved in two massive recording projects: in 2000 he began a complete cycle of Haydn's symphonies for the Hänssler label (with a completion date of 2009) and, for the same label he launched a complete set of Beethoven's symphonies in 2001.
Fey has also been associated with the music of Mozart, playing and recording much of his music, founding in 2003 both the Mozart Week Festival in Heidelberg and the Mozart Mannheim Orchestra. Fey's supporters are quick to point out the generally positive critical response throughout Europe and the United States to his concerts and recordings. Fey has made most of his recordings for the Hänssler label, and several for Accent, Profil, and Christophorus.