[1] Cadogan initially joined the Diplomatic Service and was an attaché in St Petersburg from 1834 to 1835.
[1] In 1841 he was elected Member of Parliament (MP) for Reading, a seat he held until 1847,[1][2][3] and then represented Dover from 1852 to 1857.
When the Conservatives came to power under Lord Derby in 1866, Cadogan was sworn of the Privy Council[5] and appointed Captain of the Yeomen of the Guard,[6] a post he held until 1868, the last year under the premiership of Benjamin Disraeli.
[7] Apart from his diplomatic and political careers, Lord Cadogan was the Colonel of the Royal Westminster Militia, appointed on 6 December 1841.
Lord Cadogan only survived her by four months and died at Woodrising, Norfolk, in June 1873, aged 61.