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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Economic Modeller (Energy Systems) - **Company:** Ofgem - **Location:** Cardiff, UK - **Experience:** Expert - **Salary:** £61,571.0 - **Contract:** Permanent contract - **Skills:** Microsoft Excel, R (Programming Language), Python (Programming Language), Network Planning and Design, SQL Databases, Stata, Data Processing, Software Version Control - **Published:** October 3, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5909442389 ## About the Role * Complex quantitative modelling experience (LEAD): Demonstrable experience developing, running and interpreting complex quantitative models to inform real-world decisions in energy and/or other infrastructure/market settings. This could include energy system, power market, network, dispatch/optimisation, investment appraisal, or other large-scale analytical modelling. * Analytical judgement and quality assurance: Ability to produce robust, transparent and reproducible analysis: selecting appropriate methods, documenting assumptions, quality assuring outputs, and communicating uncertainty/limitations and risk mitigations. * Communication: Strong ability to distil complex technical material into clear, decision-ready messages for different audiences (both written and oral), with excellent drafting skills. * Stakeholder engagement: Experience working collaboratively with a wide range of stakeholders (technical and non-technical), building constructive relationships and influencing outcomes through evidence. * Delivery and organisation: Ability to plan and prioritise competing tasks, manage timelines, and deliver high-quality outputs in a fast-paced environment., * Energy system / market modelling exposure: Familiarity with electricity market or energy system modelling approaches and/or tools (for example PLEXOS, BID3, Aurora, or similar), or demonstrable capability to learn and apply such tools quickly. * Sector knowledge: Experience or working knowledge of GB gas and electricity markets and market arrangements. * Technical skills: Proficiency in analytical language (e.g. Python, R, SQL, Stata) and strong data handling skills; advanced Excel capability is useful. Behaviours We'll assess you against these behaviours during the selection process: * Making Effective Decisions * Communicating and Influencing * Working Together * Changing and Improving, Successful candidates must undergo a basic (or equivalent) criminal record check. People working with government assets must complete baseline personnel security standard (opens in new window) checks. ## Description In this role, you will play a central part in establishing and embedding Ofgems new energy system modelling tool, expected to be an industry-standard platform such as BID3 or PLEXOS. Youll run, interpret and present modelling outputs that directly inform policy, regulatory design and long-term system planning. Your work will support major programmes across networks, flexibility, system operation and decarbonisation helping ensure decisions are grounded in clear, well-evidenced analysis. You will collaborate closely with experienced economists and analysts to shape our modelling approach and ways of working, including assumptions, scenarios, sensitivity analysis and quality assurance. Youll apply your quantitative skills not only to system modelling but also to wider economic analysis where needed, producing high-quality advice and clear, accessible outputs for senior decision-makers. Strong communication skills will be key, as you translate complex modelling insights into clear recommendations for a broad range of audiences. You will also work with colleagues across Ofgem to help turn policy and regulatory questions into well-defined analytical tasks, ensuring modelling is targeted, relevant and impactful. Collaboration is at the heart of this role. You will work with policy and analytical teams across Ofgem, as well as engaging external stakeholders including government, the National Electricity System Operator and academic or industry experts. You will be part of Ofgems well-established economics and analysis community, benefiting from strong peer networks, professional development and opportunities to broaden your skills. As the modelling capability matures, youll also have the chance to contribute to cross-cutting projects where your expertise adds value., You will work alongside economists, analysts and other technical specialists to shape Ofgems modelling approach, including scenario design, sensitivity analysis and proportionate quality assurance. You will also apply your quantitative skills to wider economic analysis where needed. You will produce clear drafting for internal and external audiences, including briefings and consultations, supported by strong project management and a focus on reproducible, well-documented analysis (including version control and repeatable workflows where appropriate). You will work alongside experienced analysts and economists to shape Ofgems modelling approach, ensuring it is robust, and proportionate to the question at hand, and apply your quantitative skills to wider economic analysis beyond system modelling where needed. You will provide clear, concise drafting for internal and external audiences, including contributions to briefings, internal decision documents, consultations and other outputs, supported by strong project management and quality assurance to ensure timely, high-quality delivery. You will help embed good analytical practice, including transparent documentation of assumptions, version control and repeatable workflows. You will build constructive working relationships with internal and external stakeholders and work collaboratively across teams to plan and deliver outputs effectively. Key Outputs and Deliverables In this role you will contribute to building and embedding Ofgems energy system modelling capability, while delivering high-quality analysis that supports key regulatory and policy decisions. Working as part of a team, you will be expected to: * Support capability build and model deployment: Contribute to the in-house deployment of an established energy system model, including helping shape the practical workflows, documentation and governance needed to use it effectively. * Develop model-specific expertise: Where relevant, upskill in energy system modelling tools and approaches (for example BID3 or PLEXOS), with training and support, and apply this learning quickly in delivery. Direct prior experience with these tools is welcomed but not required. * Deliver decision-ready energy system modelling: Run and interpret modelling to answer priority questions for Ofgem and the energy transition, producing outputs that are robust and proportionate to the decision context. * Provide analytical advice across Ofgem: Apply your quantitative and economic analysis skills to support teams across the organisation, translating complex evidence into clear recommendations for a range of audiences. * Maintain high analytical standards: Ensure analysis is quality-assured and reproducible. Critically assess evidence, articulate what it can and cannot tell us, and identify key risks and mitigations. * Collaborate with technical experts: Work closely with economists, analysts, and other technical colleagues to deliver a coherent work programme and build expertise across the modelling community. Key Stakeholder Relationships Internal * Workstream leads, team managers, and directors: to align modelling work with priorities and governance requirements. * Economists, analysts, data scientists and other technical specialists: to ensure a coherent analytical approach, and consistent assumptions. * Analysis Profession / Heads of Profession: to support professional development and capability-building across the community. * Policy and delivery teams across Ofgem: as customers of modelling, to translate questions into tractable analysis and clearly communicate results. External * Central government departments and arms-length bodies (as appropriate): to engage on data, assumptions, methodological choices and shared evidence bases. * National Electricity System Operator (NESO): to engage on system insights, data, and modelling approaches relevant to operational and planning questions. * Regulatory counterparts, consultants, academia and think tanks (as appropriate): to draw on evidence and test approaches including emerging modelling methods. * Wider energy sector stakeholders: to support engagement on modelling evidence where needed and ensure analysis is grounded in sector realities. Person specification Please ensure you demonstrate clearly within your answers to the application questions, how you meet each of the criteria below (no more than 1250 words). In the event of receiving a large number of applications an initial sift may take place on just the identified lead criteria indicated below., * UK nationals * nationals of the Republic of Ireland * nationals of Commonwealth countries who have the right to work in the UK * nationals of the EU, Switzerland, Norway, Iceland or Liechtenstein and family members of those nationalities with settled or pre-settled status under the European Union Settlement Scheme (EUSS) (opens in a new window) * nationals of the EU, Switzerland, Norway, Iceland or Liechtenstein and family members of those nationalities who have made a valid application for settled or pre-settled status under the European Union Settlement Scheme (EUSS) * individuals with limited leave to remain or indefinite leave to remain who were eligible to apply for EUSS on or before 31 December 2020 * Turkish nationals, and certain family members of Turkish nationals, who have accrued the right to work in the Civil Service Further information on nationality requirements (opens in a new window) Working for the Civil Service The Civil Service Code (opens in a new window) sets out the standards of behaviour expected of civil servants. We recruit by merit on the basis of fair and open competition, as outlined in the Civil Service Commission's recruitment principles (opens in a new window) . The Civil Service embraces diversity and promotes equal opportunities. As such, we run a Disability Confident Scheme (DCS) for candidates with disabilities who meet the minimum selection criteria. The Civil Service also offers a Redeployment Interview Scheme to civil servants who are at risk of redundancy, and who meet the minimum requirements for the advertised vacancy. Diversity and Inclusion The Civil Service is committed to attract, retain and invest in talent wherever it is found. To learn more please see the Civil Service People Plan (opens in a new window) and the Civil Service Diversity and Inclusion Strategy (opens in a new window) . Apply and further information This vacancy is part of the Great Place to Work for Veterans (opens in a new window) initiative. The Civil Service welcomes applications from people who have recently left prison or have an unspent conviction. 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