Senior Quantity Surveyor – Hybrid, Defence Contracts

O'Neill & Brennan; Cardiff; Hybrid; GBP 65,000 - 80,000; Full time

Benefits offered by this job

Car allowance

Hybrid working

Defence-sector exposure

Job summary

O'Neill & Brennan are seeking a Quantity Surveyor or Senior Quantity Surveyor to strengthen its Cardiff commercial team. The role covers contract administration, cost reporting and subcontract management on defence-focused construction projects, with hybrid working and flexible terms.

Ideally you have Tier 1 main contracting experience, NEC contracts, and the ability to manage commercial risk independently while collaborating with operations.

Qualifications

• Strong commercial management experience within the construction industry.
• A methodical and highly organised approach to contractual administration and financial reporting.
• Excellent understanding of subcontract procurement, valuations and final accounts.
• Experience administering NEC3 or NEC4 contracts would be highly advantageous.
• Previous exposure to defence, MOD, infrastructure or other regulated construction environments would be beneficial.
• Strong analytical skills, attention to detail and commercial judgement.
• The confidence to manage commercial responsibilities independently while working collaboratively with operational teams.

Responsibilities

• Take commercial responsibility for allocated construction contracts, ensuring effective financial and contractual management.
• Manage subcontractor procurement, appointments, valuations and final accounts.
• Assess variations, compensation events and contractual changes.
• Prepare accurate cost reports, forecasts and commercial updates.
• Identify commercial risks and opportunities throughout the contract lifecycle.
• Maintain detailed contractual records and ensure compliance with reporting procedures.
• Work closely with operational teams to monitor contract performance and protect commercial interests.
• Support commercial negotiations and maintain strong working relationships with clients and subcontractors.

Skills

Commercial management

Contract administration

Financial reporting

NEC contracts

Job description

O'Neill & Brennan are seeking a Quantity Surveyor or Senior Quantity Surveyor to strengthen its Cardiff commercial team. The role covers contract administration, cost reporting and subcontract management on defence-focused construction projects, with hybrid working and flexible terms.

Ideally you have Tier 1 main contracting experience, NEC contracts, and the ability to manage commercial risk independently while collaborating with operations.