Director General of MI5

The Director General of the Security Service is the head of the Security Service (commonly known as MI5), the United Kingdom's internal counter-intelligence and security agency. The Director General is assisted by a Deputy Director General and an Assistant Director General, and reports to the Home Secretary, although the Security Service is not formally part of the Home Office.

List of directors general
Directors General have been:
 * 1) Maj Gen Sir Vernon Kell, 1909–1940
 * 2) Brigadier 'Jasper' Harker, Acting, June 1940 – April 1941
 * 3) Sir David Petrie, 1941–1946
 * 4) Sir Percy Sillitoe, 1946–1953
 * 5) Sir Dick White, 1953–1956
 * 6) Sir Roger Hollis, 1956–1965
 * 7) Sir Martin Furnival Jones, 1965–1972
 * 8) Sir Michael Hanley, 1972–1978
 * 9) Sir Howard Smith, 1978–1981
 * 10) Sir John Jones, 1981–1985
 * 11) Sir Antony Duff, 1985–1988
 * 12) Sir Patrick Walker, 1988–1992
 * 13) Dame Stella Rimington, 1992–1996
 * 14) Sir Stephen Lander, 1996–2002
 * 15) Dame Eliza Manningham-Buller, 2002–2007
 * 16) Sir Jonathan Evans, 2007–2013
 * 17) Sir Andrew Parker, 2013–2020
 * 18) Ken McCallum, from 2020