Background
Ingier was born in Ullensaker as the son of military officer Hans Christophersøn Ingier and Anne Schulstad.
Ingier was born in Ullensaker as the son of military officer Hans Christophersøn Ingier and Anne Schulstad.
Ingier graduated from the Norwegian Military Academy, with the rank of Premier Lieutenant.
He then abandoned the military career and started a career in road construction. From the 1780s he was appointed road manager (Norwegian: generalveimester) of the Diocese of Akershus, which covered most of Eastern Norway at the time. Among his road projects were the King"s road through Krokskogen and a new road passing the mountain at Holmestrand.
He is credited for having introduced right-hand driving in Norway, by issuing posters in 1807, and this principle was included in the Road Traffic Regulation Acts of 1824 and 1851.
At his estate Ingier was running four saw mills, a corn mill, a niter mill and a powder mill. While running the activities at his estate, he retained his position as road manager.
During the Dano-Swedish War of 1808-1809 he was in command of a pioneer unit in Østfold, responsible for technical support. He was promoted to the rank Lieutenant Colonel (Norwegian: oberstløytnant) in 1809.
The Ingierstrand seaside resort in Oppegård, originally part of Stubljan and acquired by Oslo Municipality in 1936, is named after the Ingier family.