Director General Ken McCallum writes in The Times about nature of the threats facing the UK and the reasons to share these with the public.
Staff at MI5 have today joined people around the UK to remember the sacrifice of those who lost their lives protecting this country and its allies.
More people can now apply for jobs at MI5 following a change to our eligibility requirements.
As the country mourns the death of Her Majesty The Queen, we reflect on the close relationship enjoyed between The Queen and MI5 during her long reign.
Today MI5 and The Alan Turing Institute have made public our ongoing partnership, which brings together expertise from both organisations to apply artificial intelligence (AI) research to confront national security challenges.