Assistant Commercial Manager

Water & Environment

Are you looking to build your commercial career in a fast-paced, purpose-driven environment? We are seeking an enthusiastic and detail-oriented Assistant Commercial Manager to support the delivery of high-value infrastructure programmes across the Water & Environment sector, with opportunities to contribute to projects in Defence and Nuclear. This is a fantastic opportunity to gain hands-on experience, learn from industry leaders, and grow within a collaborative and forward-thinking organisation.

Your Role & Impact

Reporting to the Water Cost and Commercial Lead, you''ll assist in the commercial management of multi-workstream programmes-supporting procurement, contract administration, and post-contract delivery. You''ll work closely with project managers, cost consultants, and supply chain partners to ensure financial accuracy, compliance, and performance across all phases of the project lifecycle.

Key Responsibilities:

Commercial Delivery & Contract Support

• Assist in administering NEC3/4 ECC contracts (Options A, C & E)
• Support supplier performance tracking, risk mitigation, and contract execution
• Help maintain commercial records and ensure compliance with UK regulations

Project & Cost Management

• Contribute to feasibility studies, benchmarking, and value management
• Assist with cost planning, estimating, and post-contract cost control
• Support valuations, change control, and final account preparation

Stakeholder Engagement & Process Improvement

• Act as a reliable interface with clients, consultants, and internal teams
• Help maintain lessons learned databases and commercial reporting tools
• Contribute to continuous improvement across commercial processes

What You Bring

• Experience in commercial management or quantity surveying within infrastructure or engineering
• Strong analytical and financial modelling skills
• Familiarity with NEC3/4 contracts and CDM regulations
• Excellent communication and stakeholder engagement abilities
• Progress toward RICS chartership or equivalent professional development
• Valid CSCS card; Water Hygiene Card desirable
• Willingness to work on-site at least 3 days per week

RG Setsquare is acting as an Employment Agency in relation to this vacancy.