Educated in 1826-28 at the Royal Military College, Sandhurst, he was commissioned ensign, by purchase, in the 4th (King's Own) Regiment on 10 November 1829 and reached Sydney in the Asia on 2 December 1831.

He was appointed a magistrate on 7 October 1835; at Holy Trinity Church, Kelso near Bathurst, on 29 December 1836 he married Maria (d.1885), youngest daughter of Captain Richard Brooks.

He was involved in business dealings with his friend Captain John Piper, who had lent his home, Alloway Bank, for Zouch's wedding reception.

He returned to Goulburn in 1853 when appointed superintendent of police, Mounted Patrol, southern districts, including the Gundagai and Braidwood gold escorts.

In the next three years bushrangers, especially Ben Hall's gang, were active in his region; but, through his discretion, courage and horsemanship, Zouch won praise in parliament, at a time when the police were proving generally ineffective.