Wagemann was born in Hanover, studied law and passed both the Referendar and the Assessor state examinations with high honors.

However, upon the outbreak of the First World War he joined the Imperial German Army in August 1914 and served as an artillery battery commander on the front lines for two years.

In December 1916, he was made a public prosecutor in Frankfurt am Main and, in August 1918, a Landrichter (District Judge) in Stolp (today, Słupsk).

On 9 September 1933, Wagemann was named President of the Erbhofgericht (Hereditary Farm Court) in Celle.

[2][3] Wagemann died in a plane crash when it attempted to land in dense fog at the airport in Hamburg-Fuhlsbüttel on 11 December 1933.