Senior Quantity Surveyor – Euston & Oak Common

Location: Euston & Old Oak Common site based role

Hours: Full-time

Function: Commercial

Salary: Competitive (based on experience)

We are seeking an experienced and driven Senior Quantity Surveyor (SQS) to lead commercial management activities across our major programmes at Euston and Old Oak Common. This is a fantastic opportunity to play a key role on high‑profile infrastructure projects, working with a collaborative team in a dynamic and fast‑paced environment.

• Lead commercial functions across project packages, ensuring robust governance and compliance.

• Manage and administer NEC Option A contracts effectively, ensuring adherence to contractual obligations.

• Drive change management processes, including identification, evaluation, and agreement of variations.

• Oversee measurement and ensure accurate quantification for cost planning and valuations.

• Produce reliable forecasts, advising on project risks, opportunities, and financial performance.

• Prepare and review applications for payment, ensuring accuracy and timely submission.

• Develop and maintain project cashflows, aligning with programme and delivery forecasts.

• Lead monthly CVRs (Cost Value Reconciliations), clearly reporting commercial positions and trends.

You will be a proactive, detail‑oriented commercial professional with strong communication skills and the ability to build effective relationships with project teams, suppliers, and stakeholders. You’ll thrive in a complex environment and have a passion for driving value, ensuring commercial rigour, and supporting successful project delivery.

• Demonstrable experience with NEC Option A contracts

• Strong background in change management

• Excellent measurement and cost management skills

• Proven ability to develop accurate forecasts

• Skilled in preparing applications and managing commercial submissions

• Experience building and maintaining cashflows

• Confident in leading and presenting CVRs

Company Background

The Joseph Gallagher Group is a family owned Civil Engineering business that delivers expertise whilst putting client satisfaction at the core of the business. Built on a personal reputation for honesty and quality, we understand the actions we take affect the communities and environments we operate in.

LIFE Culture

We're promoting a culture change within the industry and demonstrating initiatives to dramatically improve Health, Safety and Wellbeing. In 2014, we launched our award‑winning cultural safety programme (LIFE) which is deeply embedded into the company’s DNA and core values.

Disability Confident Committed

We are a disability confident employer and are committed to providing equal opportunities in employment. All individuals will be treated in a fair and equal manner and in accordance with the law regardless of gender, marital status, race, religion, colour, age, disability or sexual orientation.

Reasonable Adjustments

We want to make our recruitment processes accessible to everyone, so if there is any way that we can support you to enable you to be the best you can, please contact the HR team at

For more information, please contact ellen.