The long-lived Mundy was admitted to the freedom of Wilton in April 1416, then being given formal letters authorizing his burghal privileges to be quit of tolls in other towns throughout the country,
Mundy gained election for his home town to the Parliament which assembled on 21 Jan. 1437. Although he was not returned again, he appears to have impressed his fellow burgesses, who in the following autumn chose him as mayor for the first of at least three terms. Active in the administration of Wilton for several years, Mundy is recorded taking on other tasks for the local authorities besides his official duties. For instance, in 1439-40 he received 13s. 4d. for riding to see the borough’s lord, Cardinal Beaufort, on the business of the community, and three years later he paid another visit to the cardinal, then at Canford in Dorset. As the mayor’s deputy he took a prominent part in the council’s negotiations with the prior of Ivychurch, and as mayor himself in 1454-5 he led a delegation to Salisbury to deal with a dispute concerning the local hospital of St. Giles.
When the escheator of Wiltshire conducted inquisitions post mortem at Wilton, Mundy was sometimes asked to serve on the jury, doing so following the deaths of John, earl of Arundel, in 1436, William Alexander* in 1448 and Richard Strickland* ten years later. It is less certain that he was the man who performed a like function in 1440 with regard to Isabel, countess of Warwick, for that jury met at Marlborough.
