Assistant Cost Manager in Cheshire, Warrington

North Wales Talented people are the key to our success. We are seeking a motivated and ambitious individual to join our team on the National Grid Great Grid Upgrade Framework, supporting the delivery of a diverse programme of high‑profile schemes. This role offers an excellent opportunity for someone eager to develop their skills, take on increasing responsibility, and play a key part in the successful delivery of major infrastructure works. You will be working on the PTNO/PTC1 (Pentir to Trawsfynydd) project, contributing to a significant programme that forms part of National Grid’s long‑term investment in strengthening and modernising the UK’s energy network.

Role Responsibilities

• Provide administrative support to the commercial team.
• Ensure correct cost codes are used across all plant and material requisitions and purchase orders.
• Generate system accruals for material deliveries and plant hire.
• Complete timesheets for weekly‑paid resources.
• Perform general accounts administration duties.
• Use accounts systems effectively, supported by an understanding of purchase ledger processes.

Skills, Experience And Qualifications

• Experience using accounts systems with a solid understanding of purchase ledger processes.
• Experience working with COINS (or similar construction/commercial systems).
• Microsoft Office skills, particularly Excel.
• Strong planning, organisation, and time‑management abilities.
• Ability to work effectively both independently and as part of a team.
• Confident contributing across projects, sites, or operational areas.
• Strong written communication, analytical and problem‑solving skills.
• Commitment to maintaining standards and ensuring specifications are met.
• Ability to collaborate with colleagues to support project and operational performance.

What is in it for you?

• Generous holiday entitlement with the option to buy five days.
• Flexible and adaptable working.
• Family friendly policies and work/life approach.
• Mentoring programmes and continuous learning support.
• Contributory pension scheme.
• Annual bonus scheme.
• Recognition scheme and long service awards.
• Car scheme and Private Medical Insurance (if applicable to role).
• We also provide the option to participate in our share‑save scheme; discounts including cycle to work and gym membership; a support and advice service for colleagues and their families, and more.

About The Energy Business Unit

We have extensive experience in upgrading and replacing energy networks, delivering asset management for major UK energy companies and network operators. Our transmission and distribution services involve the upgrading and replacement of electricity assets both above and below ground. Within the electricity sector we install and maintain assets, including excavation, laying, and jointing of cables, (fluid filled and XLPe), substations and overhead line, new build, repair, and refurbishment services. We have an exciting opportunity for you to join our team where you will have the opportunity to progress in your career. We are looking for people who share our passion on delivering great customer service whilst also being able to work within an enjoyable and hardworking team environment. Talented people are the key to our success, so if this sounds like you, apply now.

Morgan Sindall is an equal opportunities employer and has been accredited with the Positive About Disabled People ‘Two Ticks’ accreditation. We are also an Investors in People company. Morgan Sindall is unable to employ anyone who does not have the legal right to live and work in the UK.