On 10 July 1627, King Charles I appointed him ‘chief engineer of all castles, forts, and fortifications within Wales,’ at a salary of £240 per annum.
In 1638, he visited Guernsey and Jersey at the request of the governors, Charles Danvers, Earl of Danby and Sir Thomas Jermyn, to survey the castles on those islands and report upon them to the board of ordnance.
To this, the council assented on 29 May 1640, and on 31 December following directed all mayors, sheriffs, and justices to impress workmen in and about London and elsewhere for the works at Dover, which had been entrusted to Rudd.
The work at Portsmouth was retarded for want of funds, and in January 1642 the governor demanded stores, and leave to use materials for fortification, according to Rudd's survey of the previous year.
[1] He wrote the supplement to The Compleat Body of the Art Military, by Lieutenant-colonel Richard Elton, London, 1650; 2nd edit.