The STAR Method: How to Structure Your Answers in a Competency-Based Interview

If you have made it to a competency-based interview (CBI) with a UN organization, the panel is not trying to catch you out. They are trying to fill in a scorecard. Against each competency the vacancy names, they mark whether you gave concrete evidence that you have actually done the thing before — not whether you seem enthusiastic, and not whether you would do it well in theory. The method rests on a single principle: past behaviour is the best predictor of future behaviour.¹

That fact should reshape how you answer. The tool for delivering the evidence is a structured answer, usually called STAR — Situation, Task, Action, Result. Get the structure right and a nervous, over-modest candidate can still score well, because the panel hears exactly what they need to tick the box.

This guide is narrowly about that: how to choose the example, how to build one STAR answer, how to divide your time across its parts, and the delivery habits — including on camera — that separate a scoring answer from a rambling one. It is for the job seeker preparing for a first CBI, the new hire who wants to understand why they were hired, and the mid-career staffer heading into a promotion panel.

STAR, S-A-R, CAR, BACK — and why the labels don't matter

STAR breaks an example into four parts. Situation is the context: where you were and what was going on. Task is the specific problem or responsibility that fell to you. Action is what you personally did about it. Result is what happened because you did it.

You will also meet other labels. The UN's own applicant training sometimes renders this as three parts — Situation, Action, Result — folding the Task into the Situation.¹ Others refer it to CAR (context, action, result), STAR, and BACK (background, action, challenge, knowledge). Each technique revolves around the same basic steps: set the scene, outline the objective, describe the specific actions you took, explain the result.

Do not let the acronyms confuse you. They describe the same answer. Whether you count the setup as one beat or two, the point is identical — sketch the context quickly, then spend your airtime on what you did and what it produced. The Action and the Result are where the competency indicators actually live, so they should take the clear majority of your talking time.

A rough split for a two-to-three-minute answer:

Beginners almost always invert this, burning ninety seconds on background before they reach anything the panel can score.

Know which competencies you are actually being scored against

Here is where candidates lose marks before they open their mouths: they prepare for a generic ideal instead of the specific indicators printed in their vacancy notice.

The UN Secretariat is mid-transition between two frameworks. The 1999 "Competencies for the Future" set — the source of the familiar Professionalism, Teamwork, Planning and Organizing, Communication, Accountability, Client Orientation, Creativity, Technological Awareness — has been succeeded by the UN Values and Behaviours Framework, which comprises nine elements: four values (Inclusion, Integrity, Humility, Humanity) and five behaviours (Connect and Collaborate; Analyse and Plan; Deliver Results with Positive Impact; Learn and Develop; Adapt and Innovate). It builds on the older competencies rather than discarding them, and is explicitly intended to inform recruitment among other HR processes.³ Which set appears depends on the posting — so check.

Other organizations use their own frameworks entirely. UNICEF assesses against its own competency framework and core values; UNHCR publishes competencies with proficiency levels that rise with the grade of the post. The vocabulary differs, the underlying idea does not. The role's priorities and seniority indicate which competencies a panel will focus on, and recruiters agree the vacancy notice is the starting point: it lists the competencies that define success in that job.

Practical instruction: open the vacancy notice, find the competency section, and write each named competency at the top of a page. Those pages are your interview. Everything else is optional reading.

Choose the example before you build the answer

A STAR answer is only as strong as the story underneath it, so choose the story first. The UN's guidance is to prepare a bank of brief, real examples of your accomplishments and map them to the competencies you expect to be assessed on.¹ Build that bank before the interview, not in the room.

A good example meets three tests:

• It is real. Something that genuinely happened, so it holds up under the panel's follow-up probing — and the probing is part of the scoring.
• It is yours. You were the actor, not a bystander to someone else's win.
• It evidences the named competency. Panels score against the indicators listed for that competency, not against your general impressiveness.

Aim for a bank of five or six distinct stories drawn across your work: a delivery-under-pressure story, a difficult-stakeholder story, a planning story, a mistake-you-recovered-from story. One versatile example can be angled toward two or three competencies depending on which part you emphasize — a project you led evidences Analyse and Plan when you stress the Action, or Connect and Collaborate when you stress how you brought people along. Reuse the raw material; retell it toward whatever the question asks.

A fully worked example

Suppose the competency is Planning and Organizing (or, in the newer vocabulary, Analyse and Plan) and the question is: "Tell me about a time you had to deliver a complex piece of work under a tight deadline."

Situation: "In my previous role I supported a country office that had to submit a consolidated donor report covering four project components, and the coordinator who normally led it left three weeks before the deadline."

Task: "I was asked to take over the report and get it submitted on time and audit-ready, working with four component leads I had not managed before."

Action: "I first mapped every input the report needed against the four components and built a simple tracker with owners and interim dates. I met each component lead individually to agree what they would deliver and when, and set two short check-in calls rather than one big review at the end so I could catch gaps early. When one component's data came in late, I reworked the sequence so drafting could start on the three complete sections while I chased the fourth, and I did the final consistency and figures check myself before it went up the line."

Result: "We submitted a day ahead of the deadline. The report went through with no revisions requested by the donor, and the office adopted my tracker as the template for the next reporting cycle."

Notice the proportions: Situation and Task are two crisp sentences of context, the Action is where the detail sits, and the Result is concrete and — where possible — measurable. Notice too that every verb in the Action is "I": the panel can see precisely what you contributed.

Tightening the answer

Three habits do most of the work.

Say "I", not "we". Panels are scoring you, and "we redesigned the workflow" tells them nothing about your part. UN recruiters flag this explicitly as something candidates get wrong.⁴ Reserve "we" for genuinely shared context and switch to "I" the moment you describe your own actions. This can feel uncomfortable in a culture that prizes collective delivery — do it anyway. Claiming your own contribution is not immodesty; it is the evidence the panel is required to record.

Quantify the Result wherever you honestly can — a percentage, a timeframe, a headcount, an outcome that was adopted or reused. Where no number exists, close on a specific outcome or a clear lesson learned rather than trailing off. A stated lesson still gives the panel something to mark, and it maps directly onto behaviours like Learn and Develop.

Keep it to one example per answer. A single well-told story scores higher than three half-told ones, and it leaves room for the panel's follow-up probes.

Practise out loud and time yourself. Most people cannot feel that their Situation has run to a minute until they hear it played back. If your answers land between two and three minutes with the Action clearly the longest section, the structure is right.

Delivering it — usually on a screen

Most UN CBIs now happen on video, often with a panel of three plus a recruiter, sometimes across several time zones. That changes the delivery, and an inter-agency CBI clinic run by UNIDO and UNOV/UNODC gives useful first-party guidance:⁴

• Ask whether you may take notes. Say so at the start — that way the panel understands why you are looking down rather than assuming you are reading a script or losing interest. Your example bank can sit beside you as headings, not sentences.
• Look into the camera, not at the faces on your screen. It is the only way to make eye contact through a lens.
• Consider standing. It lifts the energy in your voice noticeably.
• Dress professionally; neutral colours read better on camera.
• Prepare a question for the panel. It is the last impression you leave.
• Expect the opener. "Tell me about yourself" is a motivational question, not a biography request — have a tight, deliberate answer ready.
• Don't assume the panel shares your context. Not everyone will know the structure of institutions or the working environment in your country. One clarifying clause of context costs you three seconds and saves the whole answer.
• Ask for clarification if a question is unclear. Listening well is itself evidence of the communication competency.

Common mistakes & FAQ

"I'll just talk generally about my strengths." The single most common failure. "I'm very organized and good under pressure" is an assertion, and assertions are unscorable. The panel needs one specific past event with a beginning, a middle and an end. Describe the time you were organized under pressure.

"I'll explain what I would do." Hypothetical answers — "I would set up a tracker, I would meet each lead" — are not evidence of past behaviour, so they earn little. Answer in the past tense about what you actually did. If a question is phrased hypothetically, anchor it back to a real example: "The last time I faced that, here is what I did."

"The Situation needs lots of detail so they understand the context." It does not. The panel needs just enough setup to make your Action make sense. Over-long context is the most common way candidates run out of time before reaching the Result — the part that actually scores.

"I'll reuse my best story for every question." One story cannot evidence five different competencies convincingly, and panels notice when it is stretched. Prepare distinct examples; angle a versatile one only where it genuinely fits the question asked.

"Does the panel prefer STAR, S-A-R, CAR or BACK?" None is wrong — UN recruiters name several, and they all describe the same skeleton.² Use whichever helps you remember to cover the ground: brief context, a clear account of your own actions, a concrete result.

"What if I don't have an example for a competency?" Widen your definition before you concede. Examples from a previous sector, a volunteer role, a study project or an internal initiative all count, provided the behaviour is real and yours. If you truly have nothing, say so briefly and offer the closest analogous experience rather than inventing one — panels probe, and invented examples collapse under a single follow-up.

"What about the 'tell me about a failure' question?" Answer it honestly, in STAR, and put the weight on the Action you took to fix it and the Result — including what you changed afterwards. A candidate who cannot name a mistake reads as either untested or unreflective.

Key takeaways

• Panels score concrete evidence of past behaviour against named competency indicators — vague or hypothetical answers cannot be marked.
• STAR, S-A-R, CAR and BACK describe the same answer. The Action and Result carry the weight, so give them most of your airtime.
• Know your framework: the Secretariat is transitioning to the UN Values and Behaviours Framework — four values and five behaviours — while other organizations use their own. Read the vacancy notice.
• Choose the example first: real, yours, and matched to the exact competency named.
• Say "I" for your own actions, keep the Situation brief, and end on a concrete — ideally measurable — Result or a clear lesson.
• Build a bank of five or six distinct stories; reuse the raw material across competencies, but give each answer one purpose-built example.
• The interview is probably on video: ask to take notes, look into the camera, and prepare a question for the panel.

Related reading

• Mastering Job Applications: Stand Out and Succeed in the Recruitment Process
• How to Land a Job in the United Nations System
• How to Find the Right UN Job for Your Skills and Experience

A CBI can feel like a memory test under stress, but it rewards preparation more than talent. Build your example bank, rehearse each story until the Action is the longest part, and trust the structure to carry you when nerves hit. The candidates who do well are rarely the most eloquent — they are the ones who arrive with real stories, ready to tell. When you are ready to put this into practice, search UN and international jobs on UNjobnet → and start mapping your best examples to the competencies each role names.

Last reviewed: August 2026. This guide is general information, not official HR or recruitment advice — always confirm the interview format and the competencies assessed with the recruiting organization and any instructions you are sent. Practices differ across the UN system and change over time.

Sources