Commercial Manager

Water & Environment

Are you ready to lead with impact and shape the future of sustainable infrastructure? Our client is seeking a forward-thinking Commercial Manager to join our expanding team, delivering high-value programmes for water companies and the Environment Agency-with exciting opportunities to support projects in Defence and Nuclear. This is your chance to drive commercial excellence, influence strategic outcomes, and grow your career across some of the UK''s most vital sectors.

Your Role & Impact

Reporting to the Water Cost and Commercial Lead, you''ll be at the heart of our commercial operations-guiding procurement, contract execution, and post-contract delivery across multi-workstream programmes. You''ll collaborate with senior stakeholders, delivery teams, and supply chain partners to ensure financial transparency, compliance, and performance. Your leadership will help shape smarter, safer, and more resilient infrastructure.

Key Responsibilities:

Strategic Commercial Leadership

• Support work-winning teams by reviewing tender packs and identifying commercial risks
• Translate insights into actionable cost control strategies and delivery plans
• Collaborate with planners, PMs, and client stakeholders to ensure financial clarity
• Oversee contract execution, supplier performance, and risk mitigation
• Ensure compliance with NEC3/4, FIDIC, UK law, and regulatory frameworks
• Guide procurement strategy and contract preparation across all phases
• Foster strong supply chain relationships through performance-based contracts
• Support construction teams in meeting delivery milestones safely and efficiently

Project & Cost Management

• Contribute to feasibility studies, benchmarking, and value management
• Lead cost planning, estimating, and final cost plan presentation
• Manage post-contract cost variances, valuations, and change control
• Oversee final account negotiation and post-project evaluation

What You Bring

• Strong financial modelling and commercial problem-solving skills
• Excellent client-facing and supply chain engagement abilities
• Experience managing teams and mentoring junior QSs
• Sector experience in water, environment, defence, or nuclear
• In-depth knowledge of CDM regulations and risk management
• NEC3/4 contract expertise (Options A, C, E essential)
• Familiarity with ECI/ESI in design & build programmes
• 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.