He has travelled all over the world, both with the orchestra and as a teacher. He is always looking for new experiences and inspiration to keep improving his skills, both in playing and teaching. Bart has taught Trombone at Conservatorium Maastricht since 2012.
Apart from being an active member of various (chamber) music ensembles such as the International Trombone Ensemble and the Brass of the Royal Concertgebouw Orchestra, he regularly gives recitals and masterclasses. Claessens has been chairman of ‘Vereniging Het Concertgebouworkest’ and board member of the Orchestra since 2015.