CMA Interview: Process, Questions & How to Prepare

What to Expect from the CMA Interview Process

The Competition and Markets Authority is a UK government department non-ministerial department, and its recruitment broadly follows Civil Service hiring conventions — though the CMA also brings its own analytical and professional rigour to the process. For most roles you can expect a multi-stage process that includes an application sift (covering statement or CV), followed by one or more interview rounds, and for some roles an additional exercise such as a written task, presentation, or case-study discussion.

Senior and specialist roles (economists, lawyers, data analysts) may involve a technical assessment or a short policy exercise designed to test how you apply knowledge to real competition or consumer-enforcement scenarios. Entry-level and policy roles typically focus more heavily on the Civil Service Success Profiles framework, which means your interview will be structured around Behaviours, Strengths, and sometimes Experience-based questions rather than abstract brain-teasers.

• Application sift: CV, personal statement, or application form aligned to the role's essential criteria
• Online assessments: situational judgement or verbal/numerical reasoning (role-dependent)
• First-stage interview: often competency or Strengths-based, sometimes by video
• Second-stage or panel interview: deeper Behaviours, technical questions, or a prepared exercise
• Presentation or written task: common for analyst, economist, and senior manager grades

The Civil Service Success Profiles and CMA Values

Because the CMA recruits under Civil Service frameworks, interviewers assess candidates against the Success Profiles model, which covers five elements: Behaviours, Strengths, Ability, Experience, and Technical. The weight given to each element varies by role and grade — check the job advert carefully, as it will specify which Behaviours are being tested and at what level.

Common Behaviours tested across CMA roles include Making Effective Decisions, Communicating and Influencing, Working Together, Delivering at Pace, and Seeing the Big Picture. For analytical and legal roles, you should also expect probing on your ability to handle complex evidence, balance competing arguments, and communicate technical findings to non-specialist audiences — all of which reflect the CMA's day-to-day work on market investigations and enforcement cases.

• Making Effective Decisions — weighing evidence, identifying risk, reaching sound conclusions
• Communicating and Influencing — clear written and verbal communication, adapting to audience
• Working Together — collaboration across teams, stakeholder management
• Delivering at Pace — prioritisation, managing deadlines under pressure
• Seeing the Big Picture — understanding how your role contributes to the CMA's wider mission

Types of Interview Questions You Are Likely to Face

CMA interviews typically blend three question types. Behaviour-based questions follow the familiar 'Tell me about a time when…' format and are best answered with the STAR method (Situation, Task, Action, Result). Strengths-based questions ('What kind of work energises you?') are harder to rehearse and are designed to surface genuine motivation — authenticity matters more than polish here. Technical or role-specific questions test subject knowledge; for economists these might explore your understanding of market definition or quantitative methods, while for lawyers they may probe merger-control procedures or consumer-protection legislation.

You may also face scenario questions ('How would you approach a situation where…') that assess judgement and problem-solving rather than past experience. These are common at the panel stage and often relate directly to the type of casework the CMA handles.

• "Tell me about a time you had to make a decision with incomplete information."
• "Describe a situation where you had to explain complex analysis to a non-technical audience."
• "How do you prioritise when several deadlines compete at the same time?"
• "What draws you to competition and consumer-protection work specifically?"
• "Walk me through how you would approach defining a relevant market in a merger case." (economist/lawyer roles)

How to Use STAR to Structure Your Answers

The STAR method gives your answers a clear narrative arc that interviewers can score against the Behaviour descriptors. Keep your Situation brief — one or two sentences to set context. Your Task should clarify your specific responsibility, not the team's. Spend most of your time on Action, using 'I' rather than 'we' to show your individual contribution. End with a concrete Result: what changed, what you delivered, what you learnt.

Here is an example for 'Making Effective Decisions' at a mid-level policy role: Situation — 'My team was advising on whether to launch a market study into a sector where the evidence was ambiguous.' Task — 'I was responsible for summarising the third-party submissions and recommending a course of action to the case lead within 48 hours.' Action — 'I mapped the submissions against our statutory criteria, flagged two pieces of contradictory data I felt needed further verification, and drafted a structured briefing that set out three options with risk assessments for each.' Result — 'The case lead adopted my recommended option, we launched a targeted review rather than a full study, which saved six months of resource and produced an early intervention that was later cited in the team's annual report.'

Preparing for Technical and Case-Study Elements

If your role involves economics, law, or data analysis, build specific knowledge of the CMA's current and recent casework. The CMA publishes case decisions, market investigation reports, and guidance documents on its website — reading two or three recent decisions in your specialist area is more valuable than memorising textbook theory. Be ready to discuss the analytical frameworks you would apply (for example, the SSNIP test in merger cases, or the consumer-welfare standard) and to show how you have applied similar thinking in previous roles.

For presentation exercises, structure matters as much as content. Open with a clear statement of the problem, walk through your analysis logically, and close with a recommendation and its limitations. Panels often probe the limitations deliberately — they want to see intellectual honesty, not overconfidence.

• Read the CMA's Annual Plan and recent press releases for topical context
• Review two or three published market-investigation or merger-decision documents
• Prepare to explain complex concepts simply — imagine briefing a minister, not a peer
• Know the CMA's primary legislation: the Competition Act 1998 and the Enterprise Act 2002 at minimum
• For data roles, be ready to discuss how you have handled large or messy datasets in practice

Practical Preparation Tips for the Interview Itself

Preparation under realistic conditions is the single biggest performance lever. If the CMA uses a timed video-interview format for early stages, practise answering on camera with a timer running — the time pressure and lack of immediate feedback are unfamiliar and worth getting used to before the real thing. ScreenReady simulates this format and gives you AI feedback on your answers, which is particularly useful for identifying filler language or answers that run over time.

Beyond format practice, write out at least five STAR examples that cover your strongest Behaviours, and be ready to flex the same example to answer slightly different questions. Research the CMA's strategic priorities (digital markets, sustainability, and the cost of living have all featured prominently in recent years) so that your motivational answers feel grounded rather than generic. Finally, prepare two or three thoughtful questions for your interviewers — asking about the team's current casework or how the panel measures success in the first six months signals genuine interest.

• Practise on camera with a timer: 2–3 minutes per Behaviour answer is a good target
• Prepare at least five STAR examples covering different Behaviours
• Tailor your 'Why the CMA?' answer to current strategic priorities, not just the organisation's mission statement
• Arrive (virtually or in person) a few minutes early and have water to hand
• Ask at least one substantive question — avoid anything easily answered by the job advert

Common Mistakes and How to Avoid Them

The most frequent errors in Civil Service-style interviews are using 'we' throughout the Action section (obscuring your individual contribution), giving answers that describe a process rather than a specific event ('I always do X…' rather than 'In March last year, I…'), and underplaying results by omitting numbers or outcomes. Interviewers are marking against a defined descriptor — if your answer does not include a clear result, you are leaving marks on the table.

A subtler mistake is failing to show genuine interest in competition and consumer-protection work specifically. The CMA is a specialist regulator with a clear public-interest mandate — interviewers notice when candidates could just as easily be applying to any government body. Connect your experience and values explicitly to the CMA's mission.