Sir Jack Cater KBE JP (Chinese: 姬達爵士; 21 February 1922 – 14 April 2006) was the chief secretary of Hong Kong from 1978 to 1981.

In February 1974, he was delighted to accept appointment to the first Commissionership of the Independent Commission Against Corruption (ICAC) by Murray MacLehose following the flight of Police Superintendent Peter Godber, who was under investigation at the time regarding several million pounds stashed in Vancouver banks.

[4]Cater was widely respected and much liked in Hong Kong for the way in which he brought the fledgling ICAC to the point where it became strong enough to survive the attacks of vested interests, and of its many enemies both within and without the government.

As a result of Cater's vital early direction, the ICAC was able to grow into a body which presided over the (almost total) eradication of corruption, both official (Governmental) and elsewhere, in Hong Kong.

A memorial was held for him in Hong Kong at the St. John's Cathedral on 21 October 2006, attended by many senior officials and prominent figures, inter alia Hong Kong Chief Executive Donald Tsang, Run Run Shaw, David Akers-Jones, former Secretary for Security Alistair Asprey, as well as Raymond Wong and Lily Yam, respectively the then current Commissioner and a former Commissioner of the ICAC.