 He was soon after appointed a Deputy Lieutenant for Suffolk on 20 December that year.By virtue of a warrant by Charles FitzRoy, 2nd Duke of Grafton, the Lord Chamberlain, Calthorpe was sworn and admitted as a Gentleman Usher Quarterly Waiter in Ordinary on 1 October 1731.By another warrant by Grafton dated 16 February 1742, he was appointed Yeoman of the Removing Wardrobe, an office he held until it was abolished in 1782.