| Date of Birth: | ??? | Place of birth: | ??? |
| Date of Death: | 1937-09-25 | Place of death: | ??? |
| Gender: | M | Nationality (in the 1930/40s): | German |
| Religion: | ??? |
Remark: Footnote in article says that Koenen died on 25th of September that year from an airplane crash.
| Institution | Role | From | To |
|---|---|---|---|
| Luftfahrtmedizinisches Institut des Reichsluftfahrtministeriums, Chef des Sanitätswesens der Luftwaffe (Stab), Reichsluftfahrtmininsterium, Berlin, Germany | Assistant Physician | 1937 | 1937 |