In 1986, he removed to Basel, where he continued his studies of the horn among other instruments at the Schola Cantorum Basiliensis under Thomas Müller-Pering and at the Conservatoire de Lausanne under Bruno Schneider.
He accompanied the master courses of Hermann Baumann and Paul Tortelier and lead the Lieder and oratorio class at the Bruckner Conservatory Linz.
From 1991 to 1995, Schultsz studied for the position of orchestral leader in Basel, Bern and Zürich under Horst Stein, Manfred Honeck, Wilfried Boettcher and Ralf Weikert.
He took part in courses on conducting under Jorma Panula in Helsinki and under Sir Edward Downes in the Kyrill Konrashin Conductors Master Classes in the Netherlands.
As an accompanist he often works with soloists such as Romanian soprano de:Elena Moșuc, Jenő Jandó, Birgit Remmert and Felix Renggli.