In discharging these responsibilities, the Director General is assisted by internal mechanisms designed to ensure that our work abides by the principles that:
MI5’s mission is to keep the country safe. For more than a century we have worked to protect our people from danger whether it be from terrorism or damaging espionage by hostile states. MI5 currently employs around 4,000 people. Around 40% of staff are women, just over half are under 40 years old, 8% are from black or ethnic minority backgrounds and 3% have a disability. At any time, several hundred staff may work in MI5 on secondment or attachment from other government departments and agencies.
Staff roles cover a number of areas including investigations, translation, data analysis, technology, surveillance, communications, information management, protective security, administration, building services and catering. MI5’s headquarters are at Thames House, a Grade II listed building situated only a few hundred yards from the Houses of Parliament in London. We also have several regional offices and headquarters in Northern Ireland.