He won the 1936 Frontières Grand Prix for sports cars at Chimay, Belgium, and the 1937 Voiturette race at the same event.
Hertzberger owned cars like a Bugatti Type 57 Stelvio 4-seater, with which he participated in the 12-hour night drive organised by the KNAC (Royal Dutch Automobile Club) in September 1926, the MG Magnette K3, a 4.5 litre Bentley and an Aston Martin.
The factory, including his Bugatti Stelvio #57519 which was parked inside, was completely destroyed at the outbreak of World War II during the bombardment of Rotterdam that prompted the surrender of Holland to the Nazis.
In Madrid Hertzberger became a member of the intelligence service of the Dutch government, which was based in London during World War II.
His wife, Eleonore Hertzberger-Katz (born 1917), wrote a book about their hazardous journeys, which was reprinted in Dutch in June 2003.