Commercial Assistant

Navartis; London; On-site; GBP 25,000 - 35,000; Full time

Job summary

A growing rail contractor in London is seeking a proactive Commercial Assistant to support commercial and financial operations across key infrastructure projects. The ideal candidate will have early commercial experience, ready to advance their career while gaining exposure to payment applications, cost reporting, and subcontractor management.

Qualifications

• Degree or diploma in relevant field required.
• Some commercial or finance-related experience (placement, graduate scheme, or 6–12 months' work) preferred.
• Good working knowledge of Microsoft Excel.

Responsibilities

• Assist in preparing and submitting payment applications and supporting documentation.
• Monitor project costs and assist with cost value reconciliations (CVRs).
• Support financial accounts, project forecasts, and cost reports.

Skills

Numerical

Analytical

Communication

Attention to Detail

Education

Degree in Quantity Surveying, Commercial Management, Construction Management, Finance, or related field

Tools

Microsoft Excel

Job description

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A growing rail contractor is looking for a proactive Commercial Assistant to join their team and support day-to-day commercial and financial operations across key infrastructure projects.

This role is ideal for someone with early commercial experience—perhaps through a graduate scheme, placement, or junior QS role—who is ready to take the next step in their career. You’ll work alongside experienced professionals, gaining hands-on exposure to applications for payment, cost reporting, forecasting, and subcontractor management within a fast-paced rail environment.

The key responsibilities for this Commercial Assistant role are:

• Assist in the preparation and submission of payment applications and supporting documentation to clients.
• Support the production and maintenance of cost value reconciliations (CVRs).
• Assist in the monitoring of project costs, including subcontractor spend and internal resource allocation.
• Help prepare and review financial accounts, project forecasts, and cost reports.
• Support invoice tracking, query resolution, and reconciliation of accounts with internal finance and operational teams.
• Maintain accurate and up-to-date commercial records, including contracts, purchase orders, and variations.
• Work with commercial managers to track contract changes, assess risk, and ensure alignment with contractual obligations.
• Assist with procurement activities and the management of subcontractor agreements.
• Provide administrative and reporting support to ensure commercial deadlines are met.

Experience required for this Commercial Assistant role are:

• Degree or diploma in Quantity Surveying, Commercial Management, Construction Management, Finance, or related field.
• Some practical experience in a commercial or finance-related role (e.g., placement year, graduate scheme, or 6–12 months’ work).
• Good working knowledge of Microsoft Excel and basic financial systems.
• Excellent numerical, analytical, and communication skills.
• Strong attention to detail and willingness to learn.

Desirable knowledge, skills & experience for this Commercial Assistant role are:

• Experience working in the rail, construction, or civil engineering sector.
• Understanding of NEC contracts or infrastructure project environments.