Stefan Thomasz (b. 1944, Timișoara, Romania) studied music in his hometown and at the Bucharest Academy of Music (1963–1968) with Joseph Prunner and Ion Cheptea. He began performing as a soloist early in his studies and, at his graduation concert, played the first movement of Dvořák’s *Cello Concerto in B minor* from his own transcription, later performing the complete work in 1974.

He appeared as a soloist with most Romanian orchestras and gave recitals in Romania, Hungary, and Germany, recording solo, orchestral, and chamber works. A member of the George Enescu Philharmonic Orchestra from 1966, he served as principal double bass from 1986 until 2008. From 1993 to 2021, he taught double bass and chamber music at the Bucharest Academy of Music, focusing on pedagogy and expanding the instrument’s repertoire through transcriptions and arrangements.