About the Role
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.
The Senior Portfolio Analyst sits within the Enterprise Portfolio Office (EPO), which is responsible for the effective management of NESO’s enterprise-wide portfolio to ensure alignment to strategic objectives and maximise the value derived from portfolio investments in delivering the organisation’s net zero goals.
Reporting to a Portfolio Manager, this role supports the end-to-end management of the Enterprise Portfolio pipeline. The role holder will provide insight, analysis and coordination to enable effective portfolio planning, prioritisation, financial management and decision-making across NESO.
The role is key to ensuring that portfolio demand is effectively captured, assessed and prioritised, and that accurate, timely information is available to support investment decisions and ongoing portfolio management.
The role can be based in Wokingham or Warwick, with hybrid working from both the office and home. Attendance in Warwick or Wokingham offices is required 1 - 2 times a week.
Key Accountabilities
Supporting the management of the Enterprise Portfolio pipeline, ensuring all demand is captured, tracked and maintained with accurate and up-to-date information.
Managing the portfolio “front door” process, coordinating submissions, ensuring completeness of information and supporting the governance and approvals process.
Support the prioritisation and phasing of portfolio activity by providing analysis, data and insights to enable alignment to strategic objectives and investment constraints.
Developing and maintaining portfolio plans, ensuring alignment across programmes, projects and key BAU initiatives.
Supporting portfolio financial tracking and reporting, ensuring accurate and timely insight on spend, forecasts and financial performance.
Developing and maintaining high-quality portfolio data, MI and reporting to provide clear, actionable insight to stakeholders and governance forums.
Supporting governance forums and approval processes by preparing high-quality materials, ensuring data accuracy and enabling effective decision-making.
Contributing to the continuous improvement of portfolio pipeline, planning and financial management processes, ensuring efficiency, consistency and best practice.
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
We’re forging the path, and we know we can’t do it alone. That’s why we need visionary minds like yours to join us on this transformative journey. In this case, we’re looking for someone who:
Is passionate about portfolio or programme management offices and understands the importance of a strategic, insight-led function.
Has a good understanding of portfolio planning, prioritisation and financial management processes.
A Professional certification in portfolio / programme / project management (e.g. MSP, MoP, PRINCE2, APM) or equivalent experience.
Demonstrates strong attention to detail, ensuring high-quality, accurate and reliable portfolio data.
Is highly organised, proactive and able to manage multiple priorities in a fast-paced environment.
Is flexible, dynamic and able to pivot quickly in response to changing organisational priorities.
Has experience supporting governance processes, approvals and business case coordination.
Brings experience in data analysis, reporting and Management Information (MI) to support decision-making.
An exceptional team player demonstrating strong communication and stakeholder engagement skills, with the ability to work effectively across teams.
What You'll Get
A competitive salary of £60,000 - £65,000 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 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.
Skills Required
- Right to work in the UK by the start of employment
- Professional certification in portfolio/programme/project management (e.g. MSP, MoP, PRINCE2, APM) or equivalent experience
- Understanding of portfolio planning, prioritisation and financial management processes
- Experience in portfolio financial tracking and reporting
- Experience in data analysis, reporting and Management Information (MI) to support decision-making
- Experience supporting governance processes, approvals and business case coordination
- Strong attention to detail and ability to maintain high-quality, accurate portfolio data
- Highly organised, proactive and able to manage multiple priorities in a fast-paced environment
- Strong communication and stakeholder engagement skills, able to work effectively across teams
What We Do
The National Energy System Operator (NESO) is an independent, government-owned public corporation responsible for the real-time operation and long-term strategic planning of Great Britain's electricity and gas networks. Its primary mission is to coordinate a whole-system approach to enable the transition to net zero, ensuring that the UK's energy system remains secure, affordable, and reliable for homes and businesses.



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