After 1223, Jocelin was a baron of the exchequer. In 1225 he served the king as head of one of the receivers of the tax of a fifteenth. After the dismissal of Walter Mauclerk as treasurer, at first Jocelin, along with Richard Poore, the Bishop of Durham, took over many of the treasurer's functions, but this did not last long, and after 1233, Jocelin no longer was involved with financial affairs. He occasionally witnessed charters, however. After the fall of Peter des Roches in April 1234, Jocelin was given control of the Wardrobe. After this, he appears less regularly in royal government, but he did witness the reconfirmation of Magna Carta in 1237.