He served as Lord High Treasurer from 1444 to 1447.

He served as Lord High Treasurer of England from 1443 to 1446.

On 10 August 1710, the office of Lord High Treasurer was put in commission.

Ayermin held the office of Lord High Treasurer from 1331 to 1332.

He briefly served as Lord High Treasurer in 1377.

From 1446 to 1449 he served as Lord High Treasurer of England.

The Lord High Treasurer had the responsibility to supervise issues concerning the economy of the state.

He also held the office of Lord High Treasurer from 14 Jan 1233 to 1234.

From 1602, the chief of the chamber was named Lord High Treasurer, riksskattmästare.

The Lord High Treasurer was then a leading and important minister of the Crown.