Prison Officer Assessment & Selection Process: Complete 2026 Guide

Prison officers work for His Majesty's Prison and Probation Service (HMPPS), part of the Ministry of Justice, in prisons across England and Wales. The role involves maintaining the safety and security of prisons, supervising and supporting prisoners, delivering rehabilitation activities, preventing violence and disorder, and working with a multidisciplinary team of healthcare, probation, and education professionals.

Contrary to common assumptions, modern prison officer work is not primarily about enforcement — it is about relationships. The most effective prison officers build constructive, professional relationships with prisoners that support rehabilitation and reduce the risk of reoffending. HMPPS selection is explicitly designed to identify candidates who can hold firm boundaries while treating people with dignity and respect.

HMPPS has straightforward eligibility requirements for prison officer (band 3) roles. There are no minimum academic qualifications required — HMPPS explicitly welcomes applications from people who left school without formal qualifications, as personal qualities and values are weighted above educational background.

The HMPPS online assessment focuses primarily on the Situational Judgement Test (SJT) and a written ability test. These are different in character from the numerical and verbal reasoning tests used by corporate employers — they assess practical judgement and communication in a prison officer context, not abstract reasoning speed.

Situational Judgement Test (Prison Officer Format)

The SJT presents realistic scenarios a prison officer might encounter — a prisoner becoming agitated, a potential conflict between prisoners, a colleague behaving inappropriately, an emergency situation requiring quick action. You are typically asked to rank 4–5 response options from most effective to least effective, or to select the best and worst responses.

• The HMPPS values are the key to answering correctly. Options that prioritise prisoner dignity, de-escalation, teamwork, and following correct procedures will almost always rank above options that use force, ignore the situation, act alone without communication, or deviate from protocol.
• De-escalation is nearly always the preferred first response. Prison officers are trained in dynamic security and relationship-based management. An option that attempts to de-escalate verbally before involving backup or force will be ranked above one that immediately escalates.
• Communication with colleagues and supervisors is always valued. Lone-wolf responses — making unilateral decisions without communicating — are consistently poorly ranked in HMPPS SJTs regardless of whether the action itself was correct.
• Treat all prisoners with dignity. Options that demean, dismiss, or use unnecessary force against prisoners score lowest. HMPPS's core commitment to treating prisoners as people who can change is explicit throughout the selection framework.

HMPPS assesses candidates against its framework of core prison service values throughout every stage of selection. The values-based interview is explicitly structured around these values — each question maps directly to one or two values. Candidates who understand the values and prepare specific STAR examples for each perform significantly better than those who answer generically.

The HMPPS assessment day is conducted in person at an HMPPS assessment venue (often a prison or regional office). The day typically consists of three elements: the values-based interview, the role play exercise, and (depending on format) a written exercise.

Role Play Exercise

This is the most distinctive element of the prison officer assessment. You are given a briefing sheet describing a scenario — for example, a prisoner who is upset about a visit being cancelled, who has become aggressive after a bad phone call, or who is suspected of being involved in contraband. You then interact with a professional actor playing the prisoner for approximately 5–10 minutes while assessors observe.

• Start by acknowledging the prisoner's emotional state, not the rule. Opening with “You can't do that” escalates. Opening with “I can see you're upset — can you tell me what's happening?” de-escalates. This sequencing matters enormously to assessors.
• Listen actively and reflect back what you hear. Demonstrating that you are genuinely listening — “So what I'm hearing is that you're worried about your family...” — is a high-scoring behaviour that models effective prison officer communication.
• Be calm, firm, and consistent throughout. Assessors specifically look for emotional regulation under pressure. If the actor escalates or becomes provocative, maintain your composure. Losing your temper or backing down entirely are both scoring failures.
• Know what you can and cannot offer. The briefing sheet will tell you the factual situation. Don't make promises you can't keep. If something is outside your control, explain that clearly and offer what you can: “I can't change the decision today, but I can help you speak to your personal officer to see if there are alternatives.”

Many candidates apply for both prison officer and police officer roles simultaneously, as both are law enforcement adjacent public sector careers with shift work patterns. Understanding the differences in selection helps you tailor your preparation for each.

• Week 1 — Research and application: Read the HMPPS official prison officer role overview and candidate pack. Understand the five HMPPS values and what each means in practice. Complete your application form with specific values-aligned answers. Research what prison officers actually do — consider watching documentaries or reading first-person accounts from serving officers.
• Week 2 — SJT and written test preparation: Practice situational judgement questions. Apply the de-escalation and communication principles from Section 04 to sample scenarios. Use our SJT guide for strategy. Practice writing a clear, structured paragraph summarising a brief scenario — the written exercise tests clarity, not creative writing.
• Week 3 — STAR stories and interview preparation: Prepare one STAR example for each of the five HMPPS values. Use real experiences from work, volunteering, caregiving, education, or community involvement. HMPPS explicitly values life experience over formal qualifications. Practice your stories with a friend who challenges you with follow-up questions. Use our STAR method guide.
• Week 4 — Role play and fitness: Practice active listening and de-escalation with a friend in simulated conversations. Work on staying calm when the conversation escalates. Begin or intensify your fitness preparation — the bleep test to 5.4 requires 15–20 minutes of aerobic fitness. See the specific test requirements and begin interval training if needed. See our police officer assessment guide for related fitness preparation frameworks.