How NESO's early-careers selection runs, from the online application and digital interview to the in-person assessment centre, with practice for each stage.
Closest practice: Cappfinity-style reasoning and workplace-scenario drills. NESO names no test provider; one candidate report names Cappfinity, so this is not NESO's own test.
By the Game Assessment Prep research teamUpdated November 10, 2026How we research
NESO publishes no game-based stage. The practice below matches the question types candidates report: scenarios, reasoning and recorded interview answers.
Category practice
Candidates report situational judgement, numerical, critical and logical reasoning sections. One report names Cappfinity. These drills practice those question types; they are not NESO's own test.
Source: AssessmentPass — NESO 2026 online assessment and video interview
Explore Untimed reasoning and workplace scenariosCategory practice
NESO names a digital interview. Candidates describe one warm-up question and three timed questions. Rehearse timed recorded answers.
Source: NESO careers — Early Careers
Explore Recorded video interviewNESO is the National Energy System Operator for Great Britain. It was National Grid's Electricity System Operator until it became a publicly owned organisation, independent of National Grid, in October 2024. NESO describes itself as commercially and operationally independent from government and regulated by Ofgem.
This guide covers NESO's early-careers routes: the 18-month graduate programme, 12-month industrial placements and apprenticeships. Experienced hires follow a different, interview-led route. If you applied to National Grid rather than NESO, read the National Grid guide instead: the two now run separate processes, even though some National Grid pages still sit on the careers.neso.energy domain.
NESO's graduate programme runs from September each year as three six-month placements in different functions, split between placements (70%), formal training (20%) and personal development (10%). Streams cover Power Systems Engineering, Business Operations, Commercial, Digital Data and Technology.
NESO's Commercial Analyst graduate advert lists Warwick or Wokingham, a September 2027 start, £35,000 plus a £2,000 welcome payment, and a minimum 2:2 in any degree discipline. Its Project Analyst graduate advert lists Warwick and a June 2027 start.
Twelve-month industrial placements start in July and cover the same five areas as the graduate programme. The Power Academy is a separate eight-week summer placement run with the Institution of Engineering and Technology (IET), and you apply through the IET, not NESO's own form.
The Trainee Power System Engineer higher apprenticeship advert lists a September 2027 start in Warwick or Wokingham, £30,000 plus a £2,000 welcome payment, study toward a Level 4 HTQ in Engineering, and entry requirements including GCSE English Language and Maths at grade 4/C and two A-levels in Maths and a science.
Source: NESO — Trainee Power System Engineer: Higher Apprenticeship (advert PDF)
NESO's early-careers page lists: apply online; "if successful you'll be invited to complete a digital interview"; an in-person assessment centre for shortlisted candidates with "group tasks and interviews"; then feedback, which everyone who attends an assessment centre can request. NESO adds that the process "may differ depending on the programme you have applied to".
Source: NESO careers — Early Careers
Neither NESO's early-careers pages nor its current graduate and apprenticeship adverts name an assessment provider, a test battery or a pass mark.
Source: NESO careers — Early Careers
A preparation site's write-up of the 2026-intake assessment describes a situational judgement section (ranking response options), a personality section answered on a slider, short numerical (6 questions), critical reasoning (16 questions) and logical reasoning (6 questions) sections, then a video interview of one warm-up and three timed questions. It names no provider. Treat the question counts as one cycle's report, not a fixed format.
Source: AssessmentPass — NESO 2026 online assessment and video interview
A Glassdoor review for a NESO graduate Project Analyst application describes a behavioural and critical reasoning test that took over an hour and names Cappfinity as the provider, with a video interview at the end. This is one candidate's account, so treat the provider as reported, not confirmed.
Source: Glassdoor — National Energy System Operator interview reports
National Grid-branded early-careers pages on the same careers domain describe a HireVue video interview and short online games. Those pages belong to National Grid's own UK programmes. NESO's own early-careers page describes no games.
Source: NESO careers — Early Careers
NESO promises to tell every candidate the status and outcome of their application.
Source: NESO careers — Early Careers
NESO's application-journey page lists the capabilities that align with its values. Use them to choose your interview examples.
Dates come from NESO's current advert PDFs, reviewed November 10, 2026. Applications are rolling, so check the live advert before you apply.
| Cycle | Application dates | Likely assessment window | Evidence |
|---|---|---|---|
| Graduate programme (September 2027 start) | Rolling; closes once all places are filled | Assessment centres from November 2026 | Official source The Commercial Analyst graduate advert says: "Closing date: ongoing – we recommend applying early!" and "Assessment centres: November 2026 onwards". |
| Higher apprenticeship (September 2027 start) | Rolling; closes once all places are filled | Assessment centres from November 2026 | Official source The Trainee Power System Engineer higher apprenticeship advert carries the same rolling closing date and assessment-centre window. Source: NESO — Trainee Power System Engineer: Higher Apprenticeship (advert PDF) |
Apply early: NESO closes each form once its places are filled, and assessment centres start in November.
Prepare for two kinds of task. The online stage rewards careful reading and steady reasoning; the interviews reward specific examples that show NESO's capabilities.
Work through situational judgement items and short numerical, critical and logical reasoning sets. When a section is untimed, use the time to check each answer against the data rather than rushing.
Record two-minute answers to common competency questions: a time you solved a complex problem, worked with a difficult stakeholder or learned a new tool quickly. Watch them back and cut filler.
Be ready to explain in plain words what a system operator does, why balancing supply and demand matters and what the clean power transition asks of the grid. Whole Energy System Awareness is one of NESO's named capabilities.
Group tasks reward listening and building on others' ideas as much as your own contribution. Prepare examples for each NESO capability, and ask the questions you have about the programme on the day.
NESO's own page names a digital interview after the application and does not name a test provider. Candidates applying to the 2026–27 intakes describe an online assessment with situational judgement, personality, and short numerical, critical and logical reasoning sections, followed by recorded video questions. One candidate report names Cappfinity.
NESO does not publish a number. A 2026-intake write-up describes one warm-up question and three formal questions, each with its own time limit.
NESO's own early-careers page describes no games. The HireVue video interview and games appear on National Grid's own early-careers pages, which cover National Grid's UK programmes, not NESO's.
NESO's current graduate and apprenticeship adverts say assessment centres run from November 2026 onwards. The centres are in person and involve group tasks and interviews.
Current graduate adverts ask for a minimum 2:2. The Commercial Analyst advert accepts any degree discipline; engineering roles list specific subjects.
NESO says everyone who attends an assessment centre can request feedback. At earlier stages, NESO's FAQ says high application volumes mean it cannot always give individual feedback.
The sources below support this guide. Claim labels distinguish official information, candidate reports, and research inferences.
NESO · Accessed
NESO · Accessed
NESO · Accessed
NESO · Accessed
NESO · Accessed
NESO · Accessed
AssessmentPass · Accessed
Glassdoor · Accessed
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