Senior Quantity Surveyor – Design Change & Commercial Lead

Smart 4 EPC; Hounslow; On-site; GBP 65,000 - 90,000; Full time

Job summary

Smart 4 EPC is seeking a Quantity Surveyor to lead commercial assessment of design changes for HS2 programmes at Heathrow. The role requires negotiation with clients, delivery partners and engineers to ensure robust commercial outcomes while maintaining NEC contract alignment.

The ideal candidate has experience in major infrastructure projects, strong change management skills, and a track record of delivering successful commercial settlements in complex programmes.

Qualifications

• Significant experience in a Senior Quantity Surveyor or Change Management role within major infrastructure programmes.
• Strong experience managing commercial impacts arising from design development and engineering change.
• Experience working within consultancy, client-side, or complex programme environments.
• Detailed knowledge of NEC contracts, particularly compensation events and change mechanisms.
• Ability to interpret engineering designs, scope documentation, technical reports, and design deliverables.
• Experience working in multidisciplinary design environments.

Responsibilities

• Lead the commercial assessment of design development and design change across HS2 programmes.
• Work closely with engineering and design teams to identify emerging change opportunities and risks at the earliest stage.
• Understand the relationship between design maturity, scope evolution, and commercial impact.
• Evaluate the cost, schedule, and risk implications arising from design modifications.
• Establish and maintain detailed change registers and governance processes.
• Ensure all changes are supported by robust technical and commercial justification.
• Prepare and manage change submissions, compensation events, instructions, and variation proposals.
• Provide commercial and contractual advice regarding entitlement arising from design changes.
• Support negotiations with clients, delivery partners, contractors, and stakeholders.
• Manage change from identification through to agreement and final account settlement.
• Maintain compliance with NEC contract requirements and HS2 commercial processes.
• Protect and maximise commercial recovery opportunities.
• Act as a trusted commercial partner to design managers, discipline leads, and project managers.
• Participate in design reviews, value engineering workshops, and assurance activities.
• Challenge scope growth and ensure commercial consequences are fully understood by project teams.
• Translate complex engineering and design issues into commercially robust narratives.
• Support decision making through cost impact and option appraisal assessments.
• Build strong working relationships across HS2, delivery partners, consultants, contractors, and project stakeholders.
• Present commercial positions and change strategies to senior leadership teams.
• Facilitate collaborative resolution of complex commercial and technical matters.

Job description

Smart 4 EPC is seeking a Quantity Surveyor to lead commercial assessment of design changes for HS2 programmes at Heathrow. The role requires negotiation with clients, delivery partners and engineers to ensure robust commercial outcomes while maintaining NEC contract alignment.

The ideal candidate has experience in major infrastructure projects, strong change management skills, and a track record of delivering successful commercial settlements in complex programmes.