"Magical" (Lohengrin), "A sound frenzy that is as magnificent as it is shattering"(La Valse), "Colorful sound shades" (Wozzeck), "His eminent sense of color and rhythm" (Schumann) - this is usually the work of the conductor RaoulGrüneis been described. In autumn 2019 he went on an extensive South America tour with the Slovenian Radio Philharmonic and Mischa Maisky, which was a complete success (“Un concierto tremendo” was the title of El Capital in Buenos Aires).

As a guest conductor, Raoul Grüneis currently works primarily with various orchestras in Poland and South America. Before that, he conducted with the German Symphony Orchestra Berlin, the Staatskapelle Weimar, the NDR Radiophilharmonie, the Stuttgart Philharmonic Orchestra, the Berlin Symphony Orchestra, the Orchester de Chambre Lausanne, the German Chamber Orchestra Berlin, the Haydn Orchestra Bozen, the Philharmonic Orchestra of Brno, Jena and Danzig, the radio orchestras of Sofia and Prague, the Sofia Chamber Orchestra, the Palatinate Chamber Orchestra, and the Gwangzhou and Seoul Philharmonic Orchestras.

Guest appearances have also taken Raoul Grüneis to the opera houses in Graz and Dublin, the Prague National Theater (Narodny divadlo), the Hanover State Opera, the Innsbruck State Theater, the Weimar National Theater and the Stuttgart State Opera, where he made his debut with Debussys Pelléas et Mélisande. Since a concertante Valkyrie with the Presidental Orchestra in Ankara, he has been associated with him as a permanent guest conductor, working there with well-known soloists such as Idil Biret, Fazil Say or Isabell Faust, especially works from the German repertoire. The success with this orchestra was the starting point for his work at the opera houses in Ankara and Istanbul (including Tannhäuser,Tales of Hoffmann, etc…).