Caecilia studied piano at the Royal Conservatorium at The Hague and then in Italy with a scholarship from the Italian government. She taught at the Institute of Musical Education at Rotterdam and is much sought after as a lecturer on group-teaching (four pupils on four pianos) and other musical subjects. Her compositions and arrangements for two and three pianos have been published by Uitgeverij Harmonia, Loosdrecht. She was decorated by Queen Beatrix.
Caecilia Andriessen comes from a well-known Dutch family of professional musicians. Her father, composer Hendrik Andriessen, was professor of music at Nijmegen University. Her brother, Louis Andriessen, has his avant-garde compositions performed all over the world. A book about the family has been published recently.