Rüegg has composed hundreds of pieces for the Vienna Art Orchestra, other European big bands, and classical orchestras, as well as theatre music and film music. Since 1994 he has composed several works for soloist and chamber orchestra.
Rüegg's extensive repertoire includes compositions for prominent orchestras, such as the Vienna Art Orchestra, European big bands, and classical ensembles, as well as theatre music and film soundtracks. Since 1994, he has composed several pieces for soloist and chamber ensembles.