He was an officer of the Staffordshire Yeomanry, being commissioned as a lieutenant in the Stafford Troop on 20 December 1819 and being promoted to captain on 26 March 1826.[1] He resigned his commission in March 1831.[2]
In 1847, he became Earl of Harrowby and took up a seat in the House of Lords. He remained out of office for a long time, but in 1855, eight years after he had succeeded his father as Earl of Harrowby, he was appointed Chancellor of the Duchy of Lancaster[7] by Lord Palmerston, becoming a Privy Counsellor at the same time.[8] In a few months he was transferred to the office of Lord Privy Seal, a position which he resigned in 1858.
He was made a Knight of the Garter in 1859.[9] Harrowby was also three times President of the Royal Statistical Society (1840–1842, 1849–1851, 1855–1857), chairman of the Maynooth commission and a member of other important royal commissions. He was regarded as among the most stalwart and prominent defenders of the Church of England.[5]
Lady Harrowby died in March 1859. Lord Harrowby remained a widower until his death at Sandon Hall on 19 November 1882, aged 84. He was succeeded in the earldom and other titles by his elder son, Dudley.