After studying at the Vienna University of Technology, Max Baczewski was a partner with Georg Popper in the patent office H. Palm (Michalecki & Co.) at Karlsplatz 1 in Vienna's 1st district.

The engineer Samuel Bauer, the proprietor of an engineering office, was married to Gittel Breine, née Goldstein (née 1880 in Brody, Galicia). The couple lived from 1927 at Julienstraße 58 in Vienna's 18th district.

Engineer Maximilian Eder worked initially on the chemical analysis of camouflage paint for Luftgaukommando XVII in Vienna before moving in 1942 to the

Regine Ehrenfest-Egger was the sister of Ernst Egger and the daughter of Bela Egger.

Hugo Theodor Horwitz lived in Berlin and Vienna and was the author of articles about the history of culture and technology.

Robert Jonas was born in 1883 in Vienna, the son of Benjamin Jonas and his wife Flora, née Spitzer, from Ballasa-Gyarmat in northern Hungary. He completed his studies in 1904 at the Niedere und Höhere Fachschule at the k. k.

Johann, known as Hans, Klinkhoff was the illegitimate child of Emma Kikinis and Max Singer, official supplier of horses to the court.

Hans Körbel moved in the early 1920s with his parents and younger brother Robert Körbel from Bielitz (now Bielsko-Biala) in Silesia to Vienna, where they lived at Neulinggasse 18 in the 3rd district.

Erich Kurzel-Runtscheiner was a curator and deputy director of the

Viktor Schützenhofer studied mechanical engineering at the Technische Hochschule in Vienna. He joined the k. k.

Leopold Singer was born as a son of the Jewish merchant Wilhelm Singer and his wife Rosalie, née Klein in Vienna in 1869.

The engineer Ernst Zix from Magdeburg joined the NSDAP in 1933. He was stationed in Vienna as a staff officer from 1938 to 1941 and as a lieutenant-colonel for a short time in 1943.