At the same time he would also follow the seminars of Günter Becker about electronic music, that would result in the actual start of his career as a composer.

1986 until present: this period is marked by the compositions of the operas: Οι Δαιμονισμένοι (The Possessed), Αλκιβιάδης (Alcibiades), Ρέκβιεμ Αχμάτοβα (Requiem), Η Δίκη (The Trial), Ιδανικοί αυτόχειρες (Idanikoi Autoxeires) and the cantata Ιουλιανός ο Παραβάτης (Julian The Apostate).

Xaris Vrondos has composed music for associations like The Athens Concert Hall Association, ALEA III, the University of Boston, the Greek Ballet, the Union of Greek Composers, the Municipality of Thessaloniki and the Paris-Sorbonne University.

He also made live concerts with his works of chamber music (Προοδευτικός Σύνδεσμος Υμηττού, 1980 - Ωδείο Athenaeum, 1995 - Εθνική Πινακοθήκη, 1996 - Μουσείο Μπενάκη, 2002 και 2006), whereas also his soloist and orchestral works have been played in Greece and Abroad.

Starting from 2014 he has been organising plays, presenting and writing pockets operas and chamber music.