Capacity Market Controller in Antrim

SONI is Northern Ireland's Transmission System Operator. We are the people behind Northern Ireland's electricity grid. We make sure that every home, business, school, hospital, factory and farm has power - when and where they need it.

As a Capacity Market Controller, you will support the management and delivery of key processes within the Capacity Markets team. You'll help prepare and analyse information, coordinate activities, and ensure that important deadlines—set out in industry rules and codes—are met. You'll work closely with your counterparts in EirGrid and collaborate with Analysts, Coordinators and Senior Controllers to keep all parts of the process running smoothly. This role is ideal for someone organised, detail‐focused, and keen to build experience in the energy sector.

• Support the day‐to‐day operation of Capacity Market Registration, Qualification, and Reporting
• Respond to internal and external queries within agreed timeframes
• Contribute to internal and external audits
• Help onboard and support training for team members
• Provide updates and reporting to the Senior Controller and Manager
• Coordinate with external user groups and follow up on actions
• Organise customer meetings and ensure clear, timely communication
• Deliver high‐quality work within agreed timelines
• Work collaboratively with EirGrid colleagues to ensure consistent processes

Note: This list is not exhaustive. All team members are encouraged to use their skills and judgement to help improve processes and support SONI's mission to operate as a world‐class Transmission System Operator.

• Degree in Business, IT, Finance, Engineering or similar, typically with 1–2 years' relevant experience
• Experience coordinating and delivering key tasks within a team
• Strong relationship‐building skills with internal and external stakeholders
• Excellent time‐management and organisational skills
• Clear and confident communicator
• Good numeracy and analytical skills
• Strong attention to detail
• High level of proficiency in Microsoft applications
• Ability to work to tight deadlines
• Ability to work effectively as part of a small team

• Experience in the energy or power systems sector
• Engineering background
• Experience presenting to large groups

Why join us? Play a vital role in shaping sustainable energy projects that benefit communities and the environment. Enjoy a competitive salary, performance-related bonus, private medical cover, and pension matching. Benefit from flexible working arrangements, including hybrid options (3 days office / 2 days home). Enhanced holidays, maternity and paternity leave and wellbeing days. Access salary sacrifice schemes (such as cycle to work, EV scheme), free car parking, onsite EV charging and complimentary lunch. Access professional development opportunities and clear career progression pathways. We offer an inclusive culture that values diversity, supports flexible working and empowers you to grow. We know flexible working means different things to different people. Contact us if you'd like to talk about how this role could work for you.

If you are seeking a challenging and impactful role within the energy sector, we'd love to hear from you. Join us in shaping the future of SONI and delivering a cleaner and more secure energy future for everyone living in Northern Ireland.

Closing date for applications is 26th March 2026. Submit your application by uploading your CV with a cover letter (in one document).

SONI is proud to be an equal opportunities employer. We value diversity and are committed to fostering an inclusive workplace where everyone can thrive. We particularly encourage women to apply, as they are currently underrepresented in our organisation. We have a duty to prevent illegal working and applicants must demonstrate they have a legal right to work in the UK. SONI is not providing sponsorship for this vacancy.