The flutist Pirmin Grehl studied in Karlsruhe and Berlin with Renate Greiss-Armin and Jacques Zoon. He was awarded prizes at several national and international music competitions. For example, Pirmin Grehl received first prize at the Carl Nielsen International Competition, Odense in 2002, and in 2004, he won second prize and received the Busch Brothers Prize at the ARD International Music Competition. In 2006, he again won the ARD Competition with his wind quintet Chantilly, and the ensemble was awarded second prize, the audience award, and the prize for a commissioned work.
From 2002 to 2017, Pirmin Grehl was solo flute of the Konzerthausorchester Berlin and played regularly as guest solo flautist in the Chamber Orchestra of Europe and major German radio orchestras, among others. As soloist he has performed with the Bavarian Radio Symphony Orchestra, the Stuttgart Radio Symphony Orchestra, the Berlin Symphony Orchestra, the German Radio Philharmonic Orchestra Saarbrücken Kaiserslautern, the Staatsorchester Rheinische Philharmonie in Koblenz, and the Jena Philharmonic, among others. He also performed numerous solo concerts with chamber orchestras such as the Berlin Chamber Orchestra, the Potsdam Chamber Academy, the Munich Chamber Orchestra, and the Kurpfälzisches Kammerorchester Mannheim. He has been a guest at major festivals such as Lockenhaus, Rheingau Music Festival, and the Mecklenburg-Vorpommern Festival.
Pirmin Grehl has recorded a variety of CDs as soloist with orchestra and in chamber music formations. In 2009, he received the French record prize Diapason d'Or for a CD of works by the composer Jonathan Harvey, with Florian Hoelscher, piano.
After several years of teaching at the Hanns Eisler School of Music in Berlin and at the Lucerne School of Music, Pirmin Grehl was appointed Professor of Flute at the Karlsruhe University of Music in 2017.