 He was also joint Lord Lieutenant of Middlesex for 1628–1642 and sole Lieutenant for 1642–1643.He served as Captain of the Yeomen of the Guard from 1617 to 1632, Master of the Horse in 1628, Constable of Windsor Castle from 1628 to 1648 and Chancellor of the University of Cambridge from 1628 until his death.During the Civil War, On Sunday 9 July 1648, seven months before the execution of King Charles I, the Earl and his army of approximately 400 men entered St Neots in the county of Huntingdonshire.