Commercial Support Co-ordinator

Client Contracts and Payment Applications

• Maintain contract and purchase order registers, ensuring accurate records of contract values, key dates, amendments and outstanding actions are tracked.
• Support the preparation and submission of applications for payment, collating timesheets, cost and progress information and ensuring submissions align with contractual requirements.
• Monitor submission deadlines, payment assessments and approvals, identifying and escalating discrepancies or delays.
• Work with the finance team to coordinate invoicing following the required commercial approvals and help resolve client queries.
• Maintain organised contract files and supporting evidence to provide clear audit trails.

Estimating and Tender Support

• Coordinate inputs from project teams and suppliers to support estimates, quotations and tender submissions.
• Populate standard estimating templates and check calculations, rates and completeness under the direction of the Commercial Manager.
• Maintain records of assumptions, exclusions, quotation validity and approvals, and track submission dates.

Subcontract and Supplier Administration

• Support the preparation of subcontract documentation using approved templates and processes.
• Gather supplier quotations and required onboarding information, and track reviews, approvals and signed agreements.
• Maintain subcontract registers, including agreed values, changes, payment dates and outstanding actions.
• Assist with the review of subcontractor payment applications, checking against agreed contractual terms and supporting delivery evidence, referring any discrepancies or queries for further review.

Change Control and Commercial Reporting

• Maintain registers of early warnings, changes and compensation events, Instructions and general communications, tracking key dates, status and supporting records.
• Help gather information for notices and change quotations, ensuring documents are reviewed and authorised before issue.
• Support monthly cost and value reporting by collating contract values, approved changes, pending changes and subcontract commitments.
• Work with Finance and Project Controls to check consistency between commercial records, project costs and forecasts.
• Prepare routine commercial summaries and highlight missing information, overdue actions and

The Ideal Candidate

The successful candidate will demonstrate:

• Strong attention to detail, numeracy and a structured approach to maintaining accurate records.
• Confidence using Excel to organise data, check calculations and prepare clear summaries.
• The ability to manage several tasks, meet deadlines and follow up outstanding information.
• Clear communication skills and confidence working with colleagues, clients and suppliers.
• A proactive and reliable approach, with the judgement to recognise when a matter needs escalation.
• A willingness to learn and develop within a commercial role.
• Experience in commercial support, contract administration, procurement, project administration or a related role is desirable.
• Familiarity with payment applications, estimating or NEC contracts would be advantageous, although training will be provided. A relevant qualification, or study towards one in business, commercial management or quantity surveying, would also be beneficial.

Administrative Responsibilities

• Maintain accurate records in commercial, project and business systems, using Microsoft 365 including Excel, Outlook and Teams.
• Follow company procedures and Quality Management System requirements, maintaining clear documentation and approval records.
• Support audits, commercial meetings and follow-up actions, and identify practical improvements to processes.
• Prepare routine commercial summaries and highlight missing information, overdue actions and potential risks.

Working Arrangements

This is a full-time role (37.5 hours per week), Monday to Friday.
React supports flexible working arrangements to balance the needs of employees and the business.

Training

Full training will be provided for internal systems and processes. Support for further development, including relevant commercial or contract administration training and professional qualifications, will be considered for the right candidate.

Team Working Expectations

• Work collaboratively and communicate clearly and effectively.
• Support the Commercial Manager and work closely with Finance, Project Controls and project delivery teams.
• Be adaptable to the changing needs of the team and business.
• Bring a positive attitude to the team, approach challenges constructively and support colleagues.
• Take a proactive approach to problem solving and continuous improvement.

The Benefits of Working at React:

• Competitive salary.
• 25 days annual leave plus bank holidays.
• Private Health Insurance.
• Company pension scheme.
• Payment of professional subscriptions.
• Cycle to work scheme.
• Working with a group of likeminded people with a can-do attitude in a dynamic and challenging environment.
• Excellent opportunities for personal development and training.

Advice to Potential applicants

To apply for this role or to request more information, please apply via the apply now link.

The deadline for applications is the 1st of November 2026.

Only short-listed candidates will be invited for interviews.

All short-listed candidates will be required to prove that they have the Right to Work in the UK during the recruitment process.

All candidates offered employment will be required to undergo pre-employment security checks against the Baseline Personal Security Standard before employment can commence.

Personal data acquired during the application process will be used in accordance with the GDPR and Data Protection Act. This means that information is confidential and can only be used for assessment and selection, and for employment records if their application is successful.

React Engineering is an equal opportunities employer. We welcome applications from all suitably qualified candidates.

For further information on how React will process your data please contact Jessica Sisson on jsisson@react-engineering.co.uk.