 As Shim On was a very capable civil administrator, he was promoted several times, and also worked in the roles of the Minister of Industry, Civil Affairs and Agriculture.When the court began selecting the candidates for the princess consort of Chungnyeong (later King Sejong), he included his daughter in the candidacy, resulting in her selection.When Chungnyeong became king in the year 1418, Shim’s daughter "Lady Shim" (심씨; 沈氏, women were referred by only their family names; ssi means family) became Queen Soheon, and Shim On rose to the office of "Prime Minister" the highest non-royal role in the country.