Trained in Vienna, from 1997 to 2013 he was artistic director of the Aalto Theatre and Generalmusikdirektor in Essen, leading the opera house to international recognition.
[7] He worked as Generalmusikdirektor (GMD) at the Staatstheater Braunschweig from 1988 to 1993, and as chief conductor at the Flemish Opera from 1992 to 1997 in Antwerp and Gent.
[7] On 22 July 2022, Soltész collapsed while conducting a performance of Richard Strauss’s Die schweigsame Frau at the National Theatre Munich.
[9] Soltész conducted recordings such as excerpts from Puccini's La Bohème,[15] Giuseppe Gazzaniga's Don Giovanni[16] and Alexander von Zemlinsky's Der Kreidekreis,[17] as well as arias and songs with Grace Bumbry,[18] Lucia Popp[19] and Dietrich Fischer-Dieskau.
[20] In 2010, he recorded the Alban Berg's Lulu Suite and Hans Werner Henze's Appassionatamente plus[21] with the Essen Philharmonic and soprano Julia Bauer, as part of the Ruhr being European Capital of Culture in 2010.