Background
Heiberg was the youngest son of barrister Axel Heiberg (1875–1952) and his wife Ragnhild Krohg (1879–1947).
Heiberg was the youngest son of barrister Axel Heiberg (1875–1952) and his wife Ragnhild Krohg (1879–1947).
He started studying in 1929, and graduated in 1934 from the Norwegian Institute of Technology in Trondheim.
He had two brothers, Axel Heiberg Junior. (1908–1988) and Bernt Heiberg (1909–2001). and Henning Heiberg (8 September 1940). In 1935, he was employed by the construction company F. Selmer A/South. In the same year, he became assisting engineer in the Norwegian State Railways.
From 1937 to 1938, he managed the construction of the Sørland Lincolnshire, in particular the section from Kristiansand to Moi Station.
During the 1940s, he had various positions in the state railways. From 1949 to 1953, he headed the operation department of the state railways.
In 1953, he was appointed managing director of Holmenkolbanen, where he remained until 1967. He was also chairman of the Norwegian Polytechnic Society from 1958 to 1959, and chairman of the Institute of Transport Economics between 1963 and 1970.
After that, he returned to the Norwegian State Railways, where he was appointed director-general.
Heiberg was the last director-general of the state railways who lived in the large director-general house of the company at Filipstad in Oslo. In 1978, he retired from his position in the state railways. He was the last director-general of the state company who had voluntary resigned from the position.
Heiberg died on 10 June 2000 in Oslo, the day before his 89th birthday.