 Manen had been teaching at the Conservatory of Asnières since 1954 and a professor at the Conservatoire de Paris since 1965.He has also taught at the Conservatoire Supérieur de Paris (CNR) and other music schools, including the École supérieure de musique César-Franck.Since 1985 he has given regular lectures at the "Académie Internationale d'Eté de Nice".