[1] After his first successes as Kapellmeister of the Vienna Volksoper and being appreciated by the Revolutionary Socialists of Austria [de] as choirmaster, he directed the music events of the Volkshochschule Ottakring.
He was a conductor at Radio Wien and the Vienna Symphony and founded an opera studio at Ludo-Hartmann-Platz in the working-class district of Ottakring.
In Buenos Aires he became the music director and head of the Filarmónica Metropolitana, in which also played with the Austrian emigrant Estéban Eitler.
Pahlen then became a professor at the Universidad de la República in Montevideo and was the founder and holder of the Department of Music History.
Not only opera-goers, but also musicians, singers and conductors appreciate the guide he has published in the series "Operas of the World" on famous works of music theater.