National Energy System Operator
Net Zero Adequacy Modeller
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About The Role
Reliable energy systems are fundamental to everyday life in Great Britain. They underpin homes, businesses, public services, and critical national infrastructure, and are essential to economic stability, public safety, and social wellbeing. As the energy system evolves through decarbonisation, increasing electrification, and greater interdependence across sectors, ensuring that it remains secure, reliable, and resilient is more important than ever. Recent events, including the North Hyde substation fire and subsequent review, and the Iberian Peninsula blackout, have reinforced the importance of understanding and strengthening resilience across the whole energy system – not only today, but for the future. The Whole Energy System Resilience (WESR) directorate strengthens whole-energy-system resilience by being a catalyst for change – turning insight into coordinated, prioritised action that reduces risk and builds capability across the system.
WESR is building its capability to maintain a strategic, system-wide view that integrates insights across all teams in the directorate and translates them into prioritised risks, workplans, and engagement strategies. This enables each team to focus on developing deep expertise and excellence in a specialist area.
This role can be based from Wokingham, Warwick, Glasgow, and we continue to offer hybrid working from office and home. We are open to full time and part time applicants, as well as flexible working arrangements.
Key Accountabilities
Support development and modelling of appropriate scenarios and sensitivities Consider how different supply and demand technologies will operate to ensure modelling reflects their contribution to security of supply appropriately (e.g. stochastic modelling of weather, plant outages) Support development of methods to improve and calculate appropriate adequacy / risk-based metrics for a decarbonised power system Support development modelling methods to assess the resources needed in the capacity mix to mitigate risks Assessing the economic feasibility of resources in the capacity mix Develop new tools to enhance the analytical studies (for example, new weather pattern modelling) Lead and support data management and quality assurance processes to ensure modelling activities remain accurate and robust Build effective working relationships and communicate security of supply modelling activities to key stakeholders to promote transparency in our modelling, ensuring that the results are both understood and trusted: Supporting delivery of key long-term adequacy study reports Delivering industry presentations and working collaboratively with industry stakeholders to test and refine the modelling Support and provide input for briefing notes for NESO senior leadership, Government and Ofgem
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About You
About you
Experience in statistical and probabilistic modelling Inquisitive mind that seeks to understand and solve analytical problems in creative ways, working collaboratively across multiple teams and stakeholder groups where appropriate Excellent interpersonal skills to develop and maintain effective stakeholder relationships Ability to communicate analytical results and concepts to a range of audiences (e.g. senior level, technical / non-technical) Knowledge of the energy system or markets is an advantage; a desire to learn more about them is essential Strong algorithmic programming skills Knowledge of PLEXOS is ideal but not essential (we can arrange training if needed)
What You'll Get
A competitive salary of £56,000 - £60,000pa dependent on experience and capabilityAs well as your base salary, NESO's core benefits are the essential perks and advantages that form part of your employee package. - You will receive a bonus based on company performance- 26 days annual leave as standard - A competitive contributory pension scheme where we will double match your contribution to a maximum company contribution of 12%. - Annual Enrollment to NESO Savings Plan, when you save between £20- £500 a month from your take-home pay, we will pay a 50% matching contribution.
Benefits
NESO's flexible benefits programme provides you with more flexibility around your helath, lifestyle and protection benefits, here's just a few available:
Flexible Bank Holidays & Holiday Trading Additional Birthday Day Off Cycle to Work Scheme, Retail & Gym Discounts Private Medical Insurance, Critical Illness Insurance & Personal Accident Insurance
About Us
At the National Energy System Operator (NESO), we play a vital role in tackling climate change and securing Great Britain's energy future. We already operate the world's fastest decarbonising electricity system and are working towards our ambition to run it carbon-free for a short period this year - provided the market supplies electricity exclusively from renewable sources. Alongside this, we provide expert advice to government on how to deliver a clean power system by 2030.
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In autumn 2024, the Electricity System Operator (ESO) transitioned to become NESO - an independent, expert public corporation with a whole-system view across electricity, gas, and hydrogen. NESO operates independently and transparently, always actin in the best interests of all energy users.
Licensed and regulated by Ofgem, we make impartial decisions that balance sustainability, affordability and security. Our organisation is fully independent from government, the regulator and all commercial interests, with a clear focus on system-wide benefit, long term thing and public value.
The time to deliver is now. Join the energy transformation and help shape the future.
Your energy. Our future. Together
National Energy System Operator (NESO) recognises the potential of bright and talented individuals, and we encourage you to join us as Great Britain’s energy system undergoes an ambitious, exciting, and vital transformation. Together with industry, we are creating a cleaner, more sustainable energy future.
More Information
This role closes at 23:59, on the date displayed on the top of this advert, however we encourage candidates to submit their application as early as possible and not wait until the published closing date as this can vary. Interviews will be held w/c 20th July 2026
Research shows that some people may hesitate to apply unless they meet every single requirement. At NESO, we believe potential comes in many forms and we're committed to a fair, inclusive recruitment
We're committed to building a workforce that represents the communities we serve, and a working environment in which each individual feels valued, respected, fairly treated, and able to reach their full potential. If this role sparks your interest but you're not sure you tick every box, we still want to hear from you. process where everyone has the opportunity to show their talents. We celebrate the difference people can bring into our organisation, and welcome and encourage applicants with diverse experiences and backgrounds.
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