In 1147, Iemori was promoted to Jugoinoge (Junior Fifth Rank, Lower Grade) and assigned the position of Hitachi no suke (Assistant Governor of Hitachi Province), and in 1148, he was promoted to Jushiinoge (Junior Fourth Rank, Lower Grade) and assigned the position of Uma no kami (Captain of the Right Division of the Bureau of Horses).
久安3年（1147年）に従五位下・常陸介、久安4年（1148年）には従四位下・右馬頭に就任。