On the other hand, he lived long, and when there was a personnel relocation followed by FUJIWARA no Yorimichi's transfer to the Grand Minister, in which Yorimichi moved over with the intention to let his own son, FUJIWARA no Morozane, be the Minister of the Interior, Sukehira became Gon Dainagon (provisional chief councilor of state) at the age of 76, and four years later, in 1065, he was raised to Dainagon (chief councilor of state).
しかし、資平自身は長寿で、藤原頼通が子の藤原師実を内大臣に引き上げるため、太政大臣に移った際の異動で、76歳にして権大納言となり、さらに4年後の康平8年（1065年）には大納言に昇った。