Principal Security of Supply Modelling Specialist

National Energy System Operator Limited; Warwick; Hybrid; GBP 72,000 - 78,000; Full time

Benefits offered by this job

26 days annual leave

Pension with company match

NESO Savings Plan

Job summary

National Energy System Operator (NESO) seeks a Principal Security of Supply Modelling Specialist to join our team. Based in the UK, you will combine deep analytical expertise with an understanding of power systems, GB electricity markets and energy policy to address emerging adequacy challenges.

You will lead cross-disciplinary work across modelling, markets and policy, shape methodologies, and guide capability development while engaging senior stakeholders across government and industry.

Qualifications

• Deep expertise in electricity security of supply, capacity adequacy assessment and probabilistic risk analysis.
• Advanced knowledge of adequacy modelling techniques, optimisation methods, statistical analysis and uncertainty assessment.

Responsibilities

• Maximise the value of NESO's specialist modelling and analytical expertise by connecting insights across adequacy modelling, technology development, electricity markets and policy, ensuring individual areas of excellence contribute to a coherent understanding of future security of supply.
• Define the future direction of security of supply assessment, working with our modelling experts to identify where existing methodologies, assumptions and analytical frameworks must evolve to address emerging energy system challenges.
• Act as a leading technical authority on electricity security of supply, providing expert insight and thought leadership on nationally significant adequacy issues.
• Serve as the technical anchor across modelling, technologies, markets and policy, integrating expertise from multiple disciplines to develop a coherent whole-system understanding of security of supply.
• Enhance and connect the work of NESO's specialist analytical teams, ensuring technical insights, methodologies and assumptions remain coherent across domains and time horizons.
• Shape external thinking and internal capability, influencing national debate on adequacy while developing the next generation of security of supply expertise within NESO.

Skills

Security of supply

Energy system adequacy

Probabilistic risk analysis

Adequacy modelling

Optimisation methods

Statistical analysis

Uncertainty assessment

PLEXOS

PyPSA

Antares

BID3

GB electricity markets

Capacity Market design

Stakeholder engagement

Technical leadership

Tools

PLEXOS

PyPSA

Antares

BID3

Job description

## Principal Security of Supply Modelling SpecialistApply: Warwick, CV34 6DA: Wokingham - St Catherine's Lodge: Full time: Posted Today: End Date: October 5, 2026 (12 days left to apply): JR100885**About the Role**The GB energy system is entering a period of unprecedented transformation. Rapid decarbonisation, evolving market frameworks, emerging technologies and increasing system complexity are fundamentally changing how security of supply risks emerge and how they must be understood.At NESO, we believe the future of adequacy assessment will not be solved in one domain. It requires individuals who can combine deep analytical expertise with an exceptional understanding of power systems, GB electricity markets and energy policy, and who can bring those disciplines together to solve problems that do not yet have established answers. To meet this challenge, we are creating a new role for an individual with an advanced set of skills, focused on the future of electricity security of supply.This role is intended for an individual with rare and highly sought-after expertise. Someone recognised not only for their technical depth, but for their ability to connect insights across modelling, technologies, markets and policy to identify emerging risks, challenge conventional thinking and shape the future direction of adequacy assessment.This role can be based from Wokingham or Warwick, 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** * **Maximise the value of NESO's specialist modelling and analytical expertise** by connecting insights across adequacy modelling, technology development, electricity markets and policy, ensuring individual areas of excellence contribute to a coherent understanding of future security of supply.* **Define the future direction of security of supply assessment,** working with our modelling experts to identify where existing methodologies, assumptions and analytical frameworks must evolve to address emerging energy system challenges.* **Act as a leading technical authority on electricity security of** **supply**, providing expert insight and thought leadership on nationally significant adequacy issues.* **Serve as the technical anchor across modelling, technologies, markets and policy**, integrating expertise from multiple disciplines to develop a coherent whole-system understanding of security of supply.* **Enhance and connect the work of NESO's specialist analytical teams**, ensuring technical insights, methodologies and assumptions remain coherent across domains and time horizons.* **Shape external thinking and internal capability**, influencing national debate on adequacy while developing the next generation of security of supply expertise within NESO. Applicants must have the right to work in the UK by the start of employment. Visa sponsorship may not be available for this role and will be considered in line with business requirements.**About You**You are recognised for your expertise in security of supply, energy system adequacy or a closely related field and can operate confidently at the intersection of modelling, technologies, markets and policy.* Significant experience within the GB energy sector, typically 10+ years, which could also include time spent in advanced academic research.* Deep expertise in electricity security of supply, capacity adequacy assessment and probabilistic risk analysis.* Advanced knowledge of adequacy modelling techniques, optimisation methods, statistical analysis and uncertainty assessment.* Expert capability in industry-standard energy market and power system modelling platforms such as PLEXOS, PyPSA, Antares, BID3 or equivalent tools.* Expert understanding of the GB electricity system, including generation technologies, storage, interconnection, flexibility markets and emerging low-carbon technologies.* Strong knowledge of GB Capacity Market design, operation and policy, together with the analytical approaches used to assess resource adequacy and security of supply.* Deep understanding of GB electricity markets, investment drivers and market participant behaviour, and how these influence adequacy outcomes.* A broad understanding of GB energy policy and the ability to identify security of supply implications arising from wider policy and market developments.* Awareness of current and emerging adequacy challenges in GB, including areas such as long-duration energy storage, storage coordination, interconnection, future market arrangements and Great Britain's relationship with the Internal Energy Market.* Experience developing novel methodologies or analytical frameworks where established approaches are insufficient to answer complex security of supply questions.* Strong communication and influencing skills, with the ability to engage credibly with senior stakeholders across Government, industry, academia and regulatory bodies.* A passion for technical leadership, collaboration and developing future capability across the wider organisation.**What You'll Get**A competitive salary of £72,000 - £78,000pa 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. NESO's flexible benefits programme provides you with more flexibility around your health, 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. 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 acting 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 day before date shown above, however we encourage candidates to submit their application as early as possible and not wait until the published closing date as this can vary.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 recruitmentWe'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.