She graduated in the spring of 1979 and made her debut as Sophie in Werther at Ljubljana Slovene National Theatre Opera and Ballet.

She was subsequently engaged as a soloist there and also began making guest appearances in other opera houses in what was then Yugoslavia.

She performed at Salzburger Festspiele, Wiener Festwochen, Edinburgh Festival, Maggio Musicale Fiorentino, Festival d'automne Paris and at some of the most important european concert halls including Musikverein and Konzerthaus in Vienna, Konzerthaus and Philharmonie in Berlin, Alte Oper in Frankfurt, Philharmonie in Köln, Théâtre du Châtelet in Paris and Auditorio Municipal in Madrid.

Collaboration with conductors: Semyon Bychkov, Michael Gielen, Vladimir Jurowski, Kirill Petrenko, Daniel Harding and others; directors: Joachim Herz, Harry Kupfer, Christine Mielitz, Liliana Cavani and others.

[4] Oršanić is also the co-founder and director of the Zinka Milanov International Competition for young opera singers.