MI5 does not run a single MI5 test. Which assessments you sit depends entirely on the role: every graduate route MI5 publishes in full opens with an online situational judgement test, most add a short online cognitive ability test, and two include a 90 minute online exercise before the interview stage. Below is the process in the order MI5 sets it out, with practice for the formats you will actually meet.
Careers at MI5
MI5 is the United Kingdom's security service. It exists to protect the UK from threats to national security, primarily terrorism and threats posed by states, and it works across three areas: countering terrorism, countering state threats and protective security. More than 5,000 people work at MI5. Its headquarters are at Thames House in central London, and it has several regional offices around the UK, including one in Northern Ireland.
MI5's internal academy runs corporate training in areas such as IT, communication skills and leadership, alongside specialist, technical and covert operational training. MI5 also publishes what it pays: its graduate development programmes start at £40,428 with a guaranteed increase after the first year, and the Intelligence Officer route lists employer pension contributions of at least 28.97%.
Types of MI5 Jobs
Positions at MI5 span intelligence, technology, languages, protective security and the corporate work MI5 calls business enablement. Roles are open to school leavers, students, graduates and experienced professionals, and the workforce runs from investigators and surveillance officers to analysts, technologists and linguists.
For school leavers, MI5 publishes the Foundation Analyst role, a three year software engineering degree apprenticeship, an 18 month infrastructure engineering apprenticeship and a range of administrative roles.
Students in their penultimate or final year at university can apply for the Summer Intelligence Internship, taken with either MI5 or GCHQ. It is paid, with free accommodation for interns who cannot commute, and eligibility is narrower than for MI5's other routes, so read the criteria before applying. Interns who complete the MI5 placement can then apply to the Intelligence Officer Development Programme.
Graduate development programmes run on five routes: the Intelligence Officer Development Programme, the Intelligence and Data Analyst Development Programme, the Technology Graduate Development Programme, the Protective Security Development Programme and Business Enablers.
How does MI5 recruit?
A common misconception is that you cannot apply to work at MI5 and have to wait for a 'tap on the shoulder'. That may have been true many years ago. Now you apply through the MI5 careers website, much like any other job.
To be eligible you must be a British citizen. If you hold dual nationality of which one component is British you will still be considered, though MI5 may impose restrictions on postings and work travel. You can apply from the age of 17, but you will not be given a start date before your 18th birthday, and you will normally need to have been resident in the UK for seven out of the last ten years. Launch the application from inside the UK, because applying from overseas holds up its progress.
One published rule catches people out: MI5 strongly advises applicants not to book new travel to Russia, Belarus, China including Hong Kong, North Korea or Iran, because travel to or through those countries can affect vetting outcomes.
MI5 Application Process
MI5 describes its recruitment as transparent and says it varies according to the role. It does not accept CVs unless a specific role requires one. The published phases are pre-screening, application and vetting, and MI5's application process page says the process can last from six to nine months. Individual role pages quote longer: the Intelligence Officer route says approximately 12 months, and the analyst and protective security programmes say nine to 12. You may only submit one application at a time.
If what you are looking for is MI5's own application form, or the login for an application already in progress, that lives on MI5's site rather than this one. Start at the MI5 careers site and open or return to your application from its vacancy pages. This page prepares you for the assessments inside that process; it is not the application system.
MI5 Pre-screening questions
The first thing you are asked to do is complete a set of pre-screening questions. MI5 uses these to find out whether you meet its initial criteria. If you do, it invites you to begin an application.
MI5 Online Application Form
Do not build your preparation around a CV. MI5 says plainly that it does not accept CVs unless a specific role requires one, so the application form itself is what gets read. Expect questions about your motivation and questions set against MI5's published competencies, and answer them with specific examples rather than a description of your duties.
MI5 Security Questionnaire
Because of the sensitivity of the work, most MI5 employees have to obtain Developed Vetting, the highest level of UK government security clearance. Vetting means detailed questionnaires, a discussion with a vetting officer, and character referees who have known you well over a significant period of your life. You will be asked about yourself, your family, your partner and your friends and associates, about your finances, including a check with a credit reference agency, and about your health and lifestyle. MI5's own guidance is that if you are unsure how much detail to provide, more is preferable, and that misleading or omitted information leads to rejection.
Note where this sits in the order. Vetting starts after a conditional offer rather than before the tests, and MI5 warns it can take several months on top of the recruitment process.
MI5 Psychometric Tests
There is no single MI5 aptitude test, and MI5 names no external test publisher. What it does publish is the exact sequence for several routes.
- Intelligence Officer Development Programme: two situational judgement tests, one general and one specific to Intelligence Officer work, then the full online application, then a 90 minute online investigative assessment.
- Intelligence and Data Analyst Development Programme: a situational judgement test, then an online cognitive ability test, then the full application, then a 90 minute subject of interest test.
- Protective Security Development Programme: a situational judgement test, then an online cognitive ability test, then the full application.
All three then run an interview, an online assessment centre and, for some candidates, a Final Selection Board, before a conditional offer and vetting.
MI5 Situational Judgement Test
The situational judgement test is the one stage common to every route MI5 publishes. MI5 describes it as an online test assessing your decision making in realistic work scenarios, and says it tests criteria important for all roles in the organisation. You read a short scenario and rate or rank the responses. On the Intelligence Officer route you sit two: one general, one built around Intelligence Officer work.
It is a genuine sift, because on the analyst and protective security routes you only reach the full application if you pass both this and the cognitive ability test. And the judgement being scored is MI5's, so practise choosing between defensible options rather than hunting for an answer that is right in the abstract.
MI5 Cognitive Ability Test
MI5 describes the cognitive ability test as a short online test measuring core reasoning skills. It does not publish the length, the number of questions or the supplier, so treat any source quoting those numbers with suspicion.
Core reasoning skills is a broad brief, which makes verbal reasoning and numerical reasoning the sensible rehearsal. Both are timed, both reward accuracy at pace, and both train the habit the job needs: pulling what matters out of a block of material quickly.
MI5 Online Investigative Assessment
On the Intelligence Officer route, the assessment following the full application is a 90 minute online exercise which MI5 describes as testing your proportionate judgement in relation to a fictitious investigation. The analyst route has an equivalent: a 90 minute subject of interest test, which MI5 says gives insight into the analyst role while evaluating your approach to problem solving.
Proportionate is the word to hold on to. This is not a knowledge test. It rewards matching your response to the actual risk and being able to explain why you drew the line where you did.
MI5 Assessment Centre
MI5's assessment centre is held online, and MI5 publishes what is in it: a competency interview, two role plays and a written assessment. Depending on how you performed earlier, you may then be invited to a Final Selection Board.
MI5 Written Assessment
MI5 does not publish what the written assessment contains, so prepare for the skill rather than the scenario. Intelligence work is largely the business of turning a mass of material into something another person can act on. Practise reading a long document against the clock, deciding what matters, and writing a short, well ordered response that leads with the answer.
MI5 Role Plays
The assessment centre includes two role plays, and again MI5 does not publish the scenarios. What it does publish is the competency framework the assessors score against, which makes communicating and influencing and making effective decisions the two worth rehearsing. Stay in role, listen properly, and be willing to move your position when you are given a reason to.
MI5 Competency/Panel Interview
MI5 uses competency based interviews for every role it recruits for, held by telephone, video call or face to face. Its own description is that the interview is timed and structured, and comprises specific questions relating to each competency area being assessed. You will typically have around five to ten minutes per question, an opening question followed by probing ones. MI5 recommends the STAR structure, situation, task, action and result, and asks you to say "I" rather than "we".
The competencies are published, in three themes:
- Future: seeing the bigger picture, driving innovation and change, continuously developing.
- People: communicating and influencing, working collaboratively, leading inclusively.
- Delivery: making effective decisions, delivering outcomes, providing customer value.
Prepare one worked example for each of the nine, and do not reuse the same story for more than two of them. Five to ten minutes is far longer than it sounds, and most candidates run dry after ninety seconds.
Top Tips To Get Hired at MI5
Discretion Is Vital
MI5 asks applicants not to discuss an application with anyone other than a partner or a close family member, to make that person aware of how important discretion is, and not to mention it on social media. It also advises setting up a separate email address for its correspondence, with no identifying features such as your name or date of birth.
It's Not Easy
Most MI5 employees have to obtain Developed Vetting, and MI5 says vetting can take several months on top of a process that already runs from six months to about a year. Its own advice is not to put your life on hold while it happens and, if you are working, to stay in your current role until you have a final offer.
Practice The Assessment Tests
Rehearse the formats under timed conditions rather than reading about them. Situational judgement is the stage every published route uses, and logical reasoning practice is a fair proxy for the core reasoning the cognitive ability test measures. Review your answers afterwards, because the value is in seeing which kind of question costs you time.
Use What MI5 Publishes
Read the page for the specific role you are applying to, because the stages differ between routes, and read MI5's own interview preparation guidance rather than second hand summaries of it. MI5 also publishes quizzes of its own, including a mobile surveillance challenge, an investigative challenge, a listening quiz drawn from English language analyst work and a values quiz. They are not the selection tests, but they are the closest preview of the work MI5 offers.
Be Adaptable
MI5 says staff are given significant autonomy over their careers and typically move jobs every two to three years, so it is not unusual to have worked in counter terrorism, recruitment, counter espionage and corporate communications in the first few years. Be ready to say how you get up to speed in an unfamiliar area.
