He transferred to aerial duty in May 1915 and began service as a two-seater pilot on artillery cooperation duty with FA(A) 207 in October. He then transferred to FA(A) 207. He was active in the skies over Verdun. He then became a
fighter pilot, and beginning 17 August 1917 was stationed with
Jagdstaffel 33. He enjoyed his first aerial success there, downing a
Sopwith northeast of
Diksmuide on 20 August 1917. After a transfer on 17 December 1917 to help found
Jagdstaffel 46, he resumed his winning ways with a double win on 16 February 1918. He would run off a string of ten more confirmed wins through 9 August, including
busting two balloons on 1 August. He ended the war with 13 victories certified; some or all of the seven more unconfirmed victories may have failed to gain approval as the German administrative system bogged down in the war's ending days. He also received his final promotion in
military rank in July 1918. Heibert would survive the war. ==Post World War I==