The Security Service is headed by a Director General, currently Jonathan Evans.
The role of the Director General was set out in the Security Service Act 1989. He is personally responsible for:
the operations and efficiency of the Service;
making an annual report on our work to the Home Secretary and the Prime Minister;
ensuring that we are politically impartial; and
ensuring that we obtain and disclose information only in accordance with our statutory responsibilities. We also disclose information for the purpose of the prevention or detection of serious crime, or for the purpose of any criminal proceedings.
In discharging these responsibilities, the Director General is assisted by internal mechanisms designed to ensure that our work abides by the principles that:
See the Security Service organisation page for more on how the Service is organised, and where the Director General fits into the management structure.