Assistant Cost Manager
Tilbury and Norwich
Talented people are the key to our success.
Would you like to join an inclusive and collaborative organisation that is recognised as one of the UK’s most successful infrastructure businesses?
We are seeking an ambitious Assistant Cost Manager to join our team on the National Grid Great Grid Partnership (GGP) framework, supporting the delivery of the Norwich to Tilbury (ATNC) project. This is a high‑profile, nationally significant energy infrastructure programme that plays a critical role in strengthening and future‑proofing the UK’s electricity network.
This is an excellent opportunity to be part of a major strategic programme, working within a supportive and high‑performing environment that encourages professional growth and progression. You will contribute to one of the UK’s most important energy upgrades, helping to shape a more resilient, future‑ready network.
Role Responsibilities
- Provide comprehensive administrative support to the commercial team, ensuring the smooth and efficient operation of day‑to‑day commercial and financial activities.
- Support the accurate processing of plant and material requisitions, ensuring the correct cost codes are applied to all purchase orders in line with project and company requirements.
- Generate, update, and maintain system accruals for material deliveries and plant hire, ensuring costs are captured accurately and reflected in timely financial reporting.
- Assist with the processing and completion of timesheets for weekly paid resources, ensuring information is accurate and submitted in line with payroll deadlines.
- Perform general accounts administration duties, including filing, data entry, and reconciliation activities, to support robust financial control and audit compliance.
- Work effectively within finance and commercial systems, applying a sound understanding of purchase ledger processes to support invoice handling, cost tracking, and supplier payments.
- Consult with site teams, suppliers, and internal stakeholders to resolve routine commercial or administrative queries efficiently and professionally.
- Maintain accurate and well‑organised commercial records and documentation, ensuring data integrity and compliance with internal procedures and reporting requirements.
- Support the commercial team with ad‑hoc tasks and reporting as required, contributing to the overall efficiency and effectiveness of the commercial function.
Skills, Experience and Qualifications
- Previous experience using accounts or finance systems, supported by a solid understanding of purchase ledger processes, including invoice handling, reconciliation, and supplier payments.
- Experience working with COINS or similar construction or commercial management systems, with the ability to navigate systems accurately and efficiently.
- Proficient in Microsoft Office, particularly Excel, with the ability to use spreadsheets for data entry, tracking, and basic reporting.
- Strong planning, organisational, and time management skills, with the ability to manage multiple tasks and meet deadlines in a fast‑paced environment.
- Ability to work effectively both independently and as part of a wider team, adapting to changing priorities and supporting colleagues as required.
- Confidence contributing across multiple projects, sites, or operational areas, engaging positively with a range of internal stakeholders.
- Strong written communication skills, with the ability to present information clearly and accurately, alongside good analytical and problem‑solving capabilities.
- An elevated level of attention to detail, with a commitment to maintaining quality standards and ensuring procedures and specifications are consistently met.
- A collaborative and initiative-taking approach, collaborating closely with colleagues to support overall project delivery and operational performance.
What is in it for you?
Below is a selection of benefits that are available to you at Morgan Sindall Infrastructure.
- 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.