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About Us
About us
Find out more about MI5’s mission and core values; our people who work to keep the country safe; and our rich and varied history.
- People
  People
  - Workforce information
- Director General
  Director General
  - Former Directors General
- Joint Terrorism Analysis Centre
  
  Joint Terrorism Analysis Centre
- Joint State Threats Assessment Team
  
  Joint State Threats Assessment Team
- National Protective Security Authority
  
  National Protective Security Authority
- Where we work
  Where we work
  - Thames House
- Partnerships
  Partnerships
  - Cinquefoil Trust
- Purpose and Values
  
  Purpose and Values
- Thames House
  
  Our headquarters, Thames House, in central London is a Grade II listed building in Westminster, not far from the Houses of Parliament.
  
  Thames House
  
  Our headquarters, Thames House, in central London is a Grade II listed building in Westminster, not far from the Houses of Parliament.
What we do
What we do
Find out about the core threats to national security that MI5 exists to protect against.
- Countering terrorism
  
  Countering terrorism
- Countering state threats
  
  Countering state threats
- Protective security
  
  Protective security
- National Protective Security Authority
  
  The National Protective Security Authority (NPSA) is part of MI5 and offers advice to businesses and organisations to help keep them and their customers safe from a range of national security threats.
  
  National Protective Security Authority
  
  The National Protective Security Authority (NPSA) is part of MI5 and offers advice to businesses and organisations to help keep them and their customers safe from a range of national security threats.
How we work
How we work
Discover how MI5 works to protect against threats to national security through intelligence gathering techniques, partnerships and legislation.
Threats and Advice
Threats and Advice
Find out how you can play your part in keeping the country safe – either as a member of the public, or as a potential new recruit.
- Terrorism threat levels
  
  Terrorism threat levels
- Resources and Links
  
  Resources and Links
- National Protective Security Authority
  
  The National Protective Security Authority (NPSA) is part of MI5 and offers advice to businesses and organisations to help keep them and their customers safe from a range of national security threats.
  
  National Protective Security Authority
  
  The National Protective Security Authority (NPSA) is part of MI5 and offers advice to businesses and organisations to help keep them and their customers safe from a range of national security threats.
History
History
Find out more about the history of MI5.
News
Careers

About Us
About us
Find out more about MI5’s mission and core values; our people who work to keep the country safe; and our rich and varied history.
- People
  People
  - Workforce information
- Director General
  Director General
  - Former Directors General
- Joint Terrorism Analysis Centre
  
  Joint Terrorism Analysis Centre
- Joint State Threats Assessment Team
  
  Joint State Threats Assessment Team
- National Protective Security Authority
  
  National Protective Security Authority
- Where we work
  Where we work
  - Thames House
- Partnerships
  Partnerships
  - Cinquefoil Trust
- Purpose and Values
  
  Purpose and Values
- Thames House
  
  Our headquarters, Thames House, in central London is a Grade II listed building in Westminster, not far from the Houses of Parliament.
  
  Thames House
  
  Our headquarters, Thames House, in central London is a Grade II listed building in Westminster, not far from the Houses of Parliament.
What we do
What we do
Find out about the core threats to national security that MI5 exists to protect against.
- Countering terrorism
  
  Countering terrorism
- Countering state threats
  
  Countering state threats
- Protective security
  
  Protective security
- National Protective Security Authority
  
  The National Protective Security Authority (NPSA) is part of MI5 and offers advice to businesses and organisations to help keep them and their customers safe from a range of national security threats.
  
  National Protective Security Authority
  
  The National Protective Security Authority (NPSA) is part of MI5 and offers advice to businesses and organisations to help keep them and their customers safe from a range of national security threats.
How we work
How we work
Discover how MI5 works to protect against threats to national security through intelligence gathering techniques, partnerships and legislation.
Threats and Advice
Threats and Advice
Find out how you can play your part in keeping the country safe – either as a member of the public, or as a potential new recruit.
- Terrorism threat levels
  
  Terrorism threat levels
- Resources and Links
  
  Resources and Links
- National Protective Security Authority
  
  The National Protective Security Authority (NPSA) is part of MI5 and offers advice to businesses and organisations to help keep them and their customers safe from a range of national security threats.
  
  National Protective Security Authority
  
  The National Protective Security Authority (NPSA) is part of MI5 and offers advice to businesses and organisations to help keep them and their customers safe from a range of national security threats.
History
History
Find out more about the history of MI5.
News
Careers

MI5 publishes gender pay gap report for 2022

Published date: 30 Mar 2023

MI5, alongside MI6 and GCHQ, have published our gender pay gap report for the 2021-2022 financial year. You can review the report on this page.

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Director General Sir Ken McCallum gives threat update

MI5 Director General Sir Ken McCallum gave his annual threat update at our headquarters in Thames House, London today.

MI5 joins Instagram

MI5 has joined Instagram with the aim of lifting the lid on what it's really like to work at the Security Service.

ITV documentary - 'Inside MI5'

The documentary showing what life is like for those who work at MI5 was first shown on Thursday 27 February on ITV1.

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