Creating, composing, improvising, and performing merge together in the artistic output of Van Haegenborgh. Besides her own compositions, Van Haegenborgh regularly performs works by John Cage, George Crumb, Morton Feldman, Peter Garland, Alvin Lucier, Thomas Smetryns and James Tenney. She was also part of several music theater productions by LOD.
As a creator, Van Haegenborgh works collaboratively with artists from a broad range of disciplines. She has created soundtracks for film artist Jasper Rigole, worked with electronic musician Jürgen De Blonde and jazz musicians Lander Gyselinck and Kristof Rosseeuw. In 2017, she wrote Index for the period instruments of the Icelandic ensemble Nordic Affect and built a ‘listening scale model’ together with Nu Architects for Concertgebouw Brugge.