Ehlen studied composition with Gerard Kockelmans, Willem de Vries Robbé and Robert Heppener, piano with Baronet Berman and Kees Steinroth and choir conducting with January Eelkema. She graduated with a degree in music education from the Maastricht Academy of Music, and taught at teacher colleges in Rotterdam, Maastricht and Sittard.
She has composed for a large variety of instruments, yet is particularly active in composition for voice. These works extend from solo vocalists to choir music Many of her compositions for voice set poetry to music
To this end she has utilized texts by Gerrit Achterberg, Anna Bijns, Emily Dickinson, Wiel Kusters and Elly de Waard.
Some others were published by the Rieks Sodenkamp publishing house in Maastricht.
