From January 1915 to November 1918, Börger took part in the First World War as a marine artillery mechanic in the Imperial German Navy.

[1] On 1 September 1929, Börger joined the Nazi Party (membership number 150,841) and became its Ortsgruppenleiter (Local Group Leader) in Neuss that same year.

In 1930, he advanced to Kreisleiter (County Leader) and, from 1932, he was the Landesobmann-West (West Regional Chairman) of the National Socialist Factory Cell Organization.

He then briefly headed the German Metalworkers Association before being appointed as a Trustee of Labour for the Rhine Province on 13 June 1933 in the Reich Ministry of Labor under Reichsminister Franz Seldte.

[4] On 1 October 1938, Börger was promoted to Ministerial Director in the Labor Ministry, overseeing Main Department I (General Administration), and also was appointed as a special trustee (Sonderstreuhänder) for mining.

[7] After Germany's defeat in the Second World War, Börger was detained and taken to an internment camp at Hessisch Lichtenau, then transferred to Nuremberg and was released in 1948.