[1] From 1967, he was a member of the ensemble at the Staatsoper Stuttgart, from 1969 of the Theater Basel, from 1970 of the Zürich Opera, and from 1973, he worked at the Deutsche Oper Berlin.

[1] Laubenthal appeared at the Bayreuth Festival in 1970, as the steersman in Der fliegende Holländer and as Kunz Vogelgesang in Die Meistersinger von Nürnberg.

[3] His roles also include the Prince in Rusalka and Wilhelm in Henze's Der junge Lord.

[4] He appeared at the Salzburg Festival in church concerts from 1973 to 1978, such as Mozart's Great Mass in C minor.

[1] Laubenthal recorded rarely played operas, such as Der Barbier von Bagdad by Peter Cornelius, singing Nurredin alongside Helen Donath and Hans Sotin, conducted by Ferdinand Leitner in 1974.