[5] She performed under the baton of Bruno Maderna, Pierre Boulez, Wolfgang Sawallisch, Georges Prêtre, Jean Fournet, Okko Kanu, David Alexander Rahbee, and with Orchestre de la Suisse Romande, R.A.I.

[10] Andersen has premiered works by American composers Michael Slayton and Dianne Goolkasian Rahbee[11] (the piano concerto and other pieces written specially for her).

[citation needed] With the "Ensemble Joseph Jongen", of which she is the founder, she has performed works by Andrzej Kwiecinski, Alain Weber, as well as rediscovered pieces by René de Castéra, Albert Roussel.

Andersen is president of EPTA-Belgium Wallonie-Bruxelles (European Piano Teachers Association)[13] and honorary professor of the Royal Conservatory of Brussels.

[citation needed] She has directed master classes in South and North America, Canada, Japan, in China, Korea and Europe.