To be hired as government official, hakutei received Jonin (investiture) after they went to Kyoto and worked as toneri (a servant) of central government official or received a court rank after they worked as Zaichokanjin (the local officials in Heian period) of kokuga (provincial government office compounds).
官司に雇われる場合には都に出て中央官司の舎人に採用されて勤務した後に叙任を受けるか、国衙の在庁官人として勤務の後に叙位を受けた。