Bahmer became deputy archivist in 1948, was named acting archivist in 1965, and became the official archivist on January 16, 1966, serving until his retirement two years later.
Bahmer assumed the position of deputy archivist in 1948, took over as acting archivist in 1965, and was formally appointed as the archivist on January 16, 1966, holding the role until his retirement in 1968.