Site Support Assistant Cost Supervisor

About the role

Our projects are more than just your opportunity to make your mark. They’re an opportunity to stretch, test and develop your expertise. Join Balfour Beattyas an Assistant Cost Supervisor in Sheffield,and you’ll deliver complex work that really matters to our business, and the world around you.

You'll provide professional, efficient, and effective support services to project teams, helping to ensure the smooth day-to-day operation of our projects. Acting as a key support function on site, you will play an important role in enabling successful project delivery through high-quality administrative, financial, and operational support.

You will be responsible for delivering consistent site support services in line with Balfour Beatty policies, procedures, and best practices, ensuring accuracy, compliance, and efficiency across all activities. Working closely with project teams and stakeholders, you will help maintain robust processes, support project controls, and contribute to the successful delivery of key business objectives.

As a valued member of the team, you will play a key role in supporting project delivery through accurate cost management, supplier engagement, and efficient financial administration. Your responsibilities will include:

• Producing accurate monthly project cost reports and maintaining effective control of project expenditure.
• Reviewing and managing team SharePoint records, including archiving documentation and processing supplier receipts.
• Investigating and resolving purchase order queries in collaboration with Procurement teams, site teams, and suppliers.
• Processing Goods Received Notes (GRNs), including bulk uploads, ensuring transactions are completed accurately and on time.
• Managing invoice queries on a daily basis and working proactively to achieve timely resolution.
• Building strong relationships with suppliers, supporting the retrieval of Proof of Delivery (POD) documentation, resolving queries, and providing excellent supplier engagement.
• Ensuring all financial transactions are processed promptly and accurately to support project reporting requirements.
• Applying site support processes consistently across all projects, ensuring compliance with company policies and procedures.
• Demonstrating and championing the Balfour Beatty Values in all aspects of your work.
• Maintaining a relentless focus on Zero Harm, promoting a safe and healthy working environment for all.

We are looking for an experienced and proactive individual with a background in site administration, project costing, and financial support within a construction or engineering environment.

You will have previous experience producing, monitoring and reporting project costs, either on a major construction project or across multiple sites. Strong stakeholder management skills are essential, with the ability to build effective working relationships at all levels, both internally across Balfour Beatty and externally with suppliers and other partners.

This is a role with significant responsibility, requiring a high level of accuracy and attention to detail when managing receipting, invoice processing and project cost control activities.

• Experience in a Site Administrator, Project Support, Cost Administrator or similar role within the construction or engineering sector.
• A proven ability to produce and report on project costs accurately and efficiently.
• Strong communication and relationship-building skills, with confidence working with a diverse range of stakeholders.
• The ability to apply and comply with Balfour Beatty's site support processes, policies and procedures.
• Excellent organisational skills and the ability to manage multiple priorities in a fast‑paced…