He did his Ph.D. dissertation in 1927 at the Heidelberg-Königstuhl State Observatory, at the University of Heidelberg.[2] At the time, the observatory at Heidelberg was a center for asteroid discovery by Max Wolf and Karl Reinmuth and others, and during his time there Bohrmann discovered 9 asteroids.[3] Bohrmann worked there from 1924 to 1969, publishing more than 700 minor planet observations.[1] He left the observatory after a dispute with the higher authority.[citation needed]