Following her studies in Hungary, she further developed her skills under the tutelage of renowned French flutist Jean-Pierre Rampal, attending classes during his concert tours in South Africa.
She quickly established herself as a leading figure in the South African classical music scene, performing as a soloist and chamber musician.
Between 1988 and 1993, she frequently traveled to Europe to stay updated on developments in flute pedagogy and created opportunities for her students to study at prestigious institutions abroad.
[2] In addition to teaching, Tamássy presented masterclasses in Stellenbosch, Cape Town, and Pécs, and created radio programmes, including a 13-part series titled From Shepherd to Symphony for the SABC.
[4][5] From 1990 to 1996, Tamássy toured with pianist Virginia Fortesque, performing duo concerts in Austria, Hungary, Scotland, and France.
Tamássy's extensive collection of flute scores is housed at the Africa Open Institute for Music, Research and Innovation in Stellenbosch.