MI5 intelligence officer interview guide

How MI5 recruits for its Intelligence Officer Development Programme: SJTs, a 90-minute investigative assessment, interviews, an assessment centre and vetting.

About MI5

MI5 says it "exists to protect the UK from threats to our national security, primarily terrorism and threats posed by states."¹ "More than 5,000 people work at MI5."¹ Its headquarters are at Thames House in Westminster, central London, and it has several regional offices around the UK, including one in Northern Ireland.¹

MI5's leadership page names Sir Ken McCallum as the current Director General. He was appointed in April 2020.²

The Intelligence Officer Development Programme

MI5 calls the IODP "a structured, six-year pathway" to becoming a fully trained Intelligence Officer.³ The programme page sets out its stages:³

• Induction. A 3-day induction.³
• Initial development posting. 18 to 24 months in a non-investigative area, such as policy, compliance, legal casework or analysis.³
• Assessed training. 9 weeks across two modules, the 3-week Investigative Data & Analysis Fundamentals and the 6-week Investigative Skills Training. Both must be passed.³
• Investigative postings. About 4 years: a first posting of two years, then rotation to a second investigative team.³

On the day-to-day work, MI5 says: "You'll assess intelligence, make evidence-based decisions, brief internal and external partners, decide investigative strategies, draft authorisations and attend meetings that support ongoing operations". Intelligence Officers "do not carry out operational fieldwork."³

The programme is full-time, 36 hours a week, Monday to Friday. It is London-based and office-based throughout, and remote, hybrid and home working are not possible.³ The IODP page, which shows no date, says: "Our starting salary is £40,428 rising to £43,705 after one year."³

You don't need prior Intelligence Officer experience. Career changers need at least one year in permanent employment, and you can also come through a Level 6 or Level 7 apprenticeship or straight from a degree.³

The application process

As MI5's IODP page describes it, in eight steps.³

1. Pre-screening

   An initial online application that "Confirms your eligibility for the programme."³

2. Situational Judgement Tests2 tests

   "One general, one specific to Intelligence Officer work". They are "Online tests assessing your decision-making skills in realistic work scenarios."³

3. Full online application

   "Completed only if you pass both SJTs."³ MI5's general Application Process page, which covers all its roles, says "We don't accept CVs unless required for a specific role".⁴

4. Online investigative assessment90 min

   "A 90-minute assessment testing your proportionate judgement in relation to a fictitious investigation."³

5. Telephone interview

   It "Explores your motivation for the role and includes competency-based questions."³

6. Online assessment centre

   The assessment centre "Includes a competency interview, two role-plays and a written assessment."³

   • Final Selection Board. "Following the assessment centre, you may be invited to attend a Final Selection Board meeting. This will depend on your performance at earlier stages."³
7. Conditional offer

   "If successful at the assessment centre, you will receive a conditional offer subject to security, admin and health checks". These include a medical declaration and e-Vetting.³

8. Developed Vetting

   You "will need to attain the highest level of clearance known as Developed Vetting". MI5 adds: "As vetting can take several months, we ask that you don't put your life on hold while you go through this process."³

   • Vetting interview. "To attain DV clearance, you will attend a vetting interview". MI5's vetting page says "We'll ask you about your friends, your family, your finances, and everything in between" and "There are no right or wrong answers."⁵
   • Other checks. Vetting also involves character referees, documents such as passports and bank statements, and contact with your current employer with your permission.⁵

MI5 gives two timescales, each with its own scope. For the IODP, it says "Our application process is thorough and takes approximately 12 months", and "we recommend staying in your current role until you receive a final offer."³ Its general Application Process page, which covers all MI5 roles, says the recruitment process "varies according to the role" and "The process can last from six to nine months."⁴

The same general page says "You may only submit one application at a time", and that you can request reasonable adjustments "at any stage of the recruitment process".⁴

MI5's vetting page asks for discretion: "You should not discuss your application other than with your partner or a close family member, providing they are British". It adds: "You should not post on social media about your application or discuss it with anyone else at this stage."⁵

What MI5 looks for

For the IODP, MI5 says: "You'll need transferable skills such as analysing information, solving problems and working well under pressure, along with strong communication, curiosity and the ability to collaborate effectively."³ Candidates also need to be "comfortable with the ethical responsibilities that come with investigating individuals or groups who may pose harm."³

"MI5's mission is to keep the country safe, both now and in the future." It names four values:⁶

• Making a difference. "Our singular focus on the mission, striving for real results that make the country safer".⁶
• Teamwork. "Working as one as MI5, bringing together in common purpose the best that everyone can give".⁶
• Professionalism. "Highest standards of integrity, objectivity and sense of proportion".⁶
• Innovation. "Constantly seeking new ideas and different approaches to advance our capabilities".⁶

Questions to expect

Based on what MI5 says each stage tests. These are our own practice questions, not ones MI5 publishes.

How to prepare

1. Plan around a long process. MI5 recommends staying in your current role until you receive a final offer, and asks that you don't put your life on hold during vetting.³
2. Keep your application private. Only discuss it with your partner or a close family member, providing they are British, and don't post about it on social media.⁵
3. Practise weighing proportionality. The investigative assessment tests proportionate judgement, and MI5's Professionalism value includes a "sense of proportion".^{3, 6} Work through scenarios where you balance how serious a risk is against how intrusive a response would be.
4. Build stories around the IODP skills. MI5 lists analysing information, solving problems, working under pressure, communicating, curiosity and collaborating.³ Prepare a real example for each.
5. Sharpen your motivation answer. MI5 says the telephone interview explores your motivation for the role.³ It says the IODP is office-based and that Intelligence Officers "do not carry out operational fieldwork".³ Be ready to explain why investigative work appeals to you.
6. Be honest in vetting. MI5 says there are no right or wrong answers in the vetting interview. Have documents such as passports and bank statements to hand, and think about who could act as a character referee.⁵
7. Know the drugs policy. MI5 says "Our staff and contractors are subject to a no drugs policy" and "You must adhere to our policy from the point of application onwards."⁵
8. Ask for adjustments if you need them. You can request reasonable adjustments at any stage.⁴

Worth mentioning in the interview

• In his annual threat update on 16 October 2025, Sir Ken McCallum said: "Since the start of 2020, MI5 and the police have disrupted 19 late-stage attack plots."⁷
• In the same update he said "MI5 has tracked more than twenty potentially lethal Iran-backed plots in just the one year" since his previous speech, and reported a 35% increase in the number of individuals investigated for state threat activity in the last year.⁷
• On 1 May 2026, JTAC raised the UK National Threat Level from SUBSTANTIAL to SEVERE, meaning an attack is highly likely. This followed the Golders Green stabbings on 29 April, "although it is not solely a result of that attack."⁸
• The National Security (State Threats) Bill received Royal Assent in July 2026, the day before MI5's statement of 9 July 2026. It gives the Home Secretary "new powers to protect the public from individuals and groups carrying out hostile activity for foreign states", and the Director General welcomed it.⁹
• On 30 September 2026 MI5 issued an Espionage Alert about the China General Technology Research Institute (CGTRI), saying it funds research to improve Chinese Ministry of State Security espionage capability. It advised "UK academic institutions to immediately review any ongoing or planned collaboration with CGTRI."¹⁰

Quick answers

Sources

1. About Us | MI5 - The Security ServiceMI5
2. Leadership | MI5 - The Security ServiceMI5
3. IODP | MI5 - The Security ServiceMI5 Careers
4. Application Process | MI5 - The Security ServiceMI5 Careers
5. Vetting | MI5 - The Security ServiceMI5 Careers
6. Purpose and Values | MI5 - The Security ServiceMI5
7. Director General Sir Ken McCallum gives threat updateMI5 · 16 Oct 2025
8. UK National Terrorism Threat Level Raised To SEVEREMI5 · 1 May 2026
9. Director General MI5 Welcomes New LegislationMI5 · 9 Jul 2026
10. MI5 issues Espionage Alert - CGTRI 中国通用技术研究院MI5 · 30 Sep 2026

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