Senior Site manager

Reference: Brighton_
Posted: August 19, 2026

We are currently seeking an experienced Commercial Senior Site Manager to join a major construction project on a freelance basis.

This is an excellent opportunity for a confident and commercially aware Site Manager with a strong track record of delivering complex construction projects safely, efficiently and to programme.

The Role

As Commercial Senior Site Manager, you will take responsibility for the day-to-day management and delivery of the project, working closely with the Project Manager, Commercial Team, subcontractors and wider site management team.

You will be responsible for ensuring works are delivered to the required quality, programme, health & safety and commercial standards, while maintaining strong relationships with clients, consultants and supply-chain partners.

Key Responsibilities

• Lead and manage site activities from mobilisation through to completion.
• Coordinate subcontractors, site teams and suppliers.
• Ensure works are delivered in accordance with drawings, specifications and programme requirements.
• Monitor progress, productivity and site performance.
• Work closely with the commercial team to identify and manage variations, change and potential commercial risks.
• Assist with programme planning, sequencing and resource allocation.
• Attend progress, coordination and client meetings.
• Maintain accurate site records, reports and project documentation.
• Ensure all works comply with health & safety legislation and company procedures.
• Manage quality assurance and ensure defects are identified and resolved promptly.
• Monitor subcontractor performance and hold teams accountable for delivery.
• Support cost control and commercial decision-making throughout the project.
• Liaise effectively with the client, consultants, designers and supply chain.
• Provide strong leadership and drive a positive, collaborative site culture.

About You

The successful candidate will have:

• Proven experience as a Senior Site Manager / Construction Manager on major projects.
• Strong commercial awareness and an understanding of project costs, variations and change control.
• Excellent knowledge of construction methods, sequencing and site management.
• A strong track record of delivering projects safely, on programme and to a high standard.
• Excellent leadership, communication and stakeholder-management skills.
• The ability to manage multiple priorities in a fast-paced construction environment.
• Strong organisational and problem-solving abilities.
• Relevant construction qualifications, with SMSTS, CSCS and First Aid desirable/required.
• A proactive, professional approach with the confidence to make decisions and challenge where necessary.

What's on Offer

• Opportunity to work on a high-profile construction project.
• Supportive and professional project team.
• Immediate or agreed start available.