| Directors General of the SSS | Term of Service |
|---|---|
| Colonel Abdullahi Mohammed (DG NSO) | 1976–1979 (October) |
| Alhaji Umaru Shinkafi (DG NSO) | 1979 (October) – 1983 (November) |
| Ambassador Mohammed Lawal Rafindadi (DG NSO) | 1984 (January) – 1985 (August) |
| Alhaji Ismaila Gwarzo | 1986 (June) – 1990 (September) |
| Chief Albert Horsfall | 1990 (September) – 1992 (October) |
| Chief Peter Nwaoduah | 1992 (October) – 1998 |
| Colonel Kayode Are (Rtd) | 1999 – 2007 (August) |
| Afakriya Gadzama | 2007 (August) – 2010 (September) |
| Ita Ekpeyong | 2010 (September) - present |
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“The general tendency of things throughout the world is to render mediocrity the ascendant power among mankind.”
—John Stuart Mill (1806–1873)