Konstantin Krimmel, with German-Romanian roots, first got in touch with music singing at the St. George's Choir Boys in Ulm. Even in his student days, Konstantin Krimmel developed a special love for the concert and lied repertoire; since then, he has won numerous competitions, including the German Music Competition 2019 as well as 1st prize at the International Helmut Deutsch Lied Competition and the 2nd prize at the International Singing Competition 'Das Lied' in Heidelberg. He has performed recitals at the Kölner Philharmonie, the Deutsche Opern Berlin, the Konzerthaus Berlin, the Oper Frankfurt, the Heidelberger Frühling, the Schubertíada, the Schubertiade in Schwarzenberg, as well as in Madrid, in London (Wigmore Hall) and at the Lied Festival in Oxford. He is a member of the BBC New Generation Artists (2021-2023) and the Bavarian Opera, where he has performed, among others, the roles of Guglielmo (Così fan tutte), Papageno (Die Zauberflöte), Harlekin (Ariadne auf Naxos) and Yoshio (Hanjo).

Heide is one of the most sought-after piano accompanists and chamber musicians of his generation, performing throughout Europe and Asia since his graduation from Franz-Liszt-Hochschule in Weimar. He regularly works with singers such as Andrè Schuen, Christoph Prégardien, and Roman Trekel. He has also played with Marie Seidler, Hanno Müller-Brachmann, Luca Pisaroni, Ruth Ziesak, Katharina Konradi and Konstantin Krimmel. In the field of chamber music, he has performed concerts with soloists such as Tabea Zimmermann, Antje Weithaas, Wolfgang Emanuel Schmidt, Jens Peter Maintz, Friedemann Eichhorn, Barbara Buntrock, Julian Steckel, and Konstanze von Gutzeit. His CD Poêmes, recorded with mezzo-soprano Stella Doufexis, performing songs by Claude Debussy, received the German Record Critics' Award in 2013, while his CD with Andrè Schuen performing lieder by Robert Schumann, Hugo Wolf, and Frank Martin was awarded the ECHO Klassik 2016 prize in the Best Newcomer category.