Senior Quantity Surveyor/Commercial Manager

A bit about us

Vextrix was founded to create a socially conscious business, where all of our clients and staff feel valued. In our growing business we create an environment for our team where each individual can develop and progress, benefitting from the experience of our senior team and exciting opportunities with our clients. Collaboratively, we all live our values and deliver on our unique guarantees which is why our clients trust us as their consultant of choice.

A bit about the role

We are looking for an experienced Senior Quantity Surveyor to become a part of our team, based in our London office; working on and supporting project delivery across a variety of infrastructure sectors. The successful candidate will be interested in working in the Rail sector within a Design & Build environment.

In the role you will provide high-quality pre-contract and post-contract commercial management, helping clients and project teams achieve strong financial control, effective contract administration and value for money.

This is a senior, client facing role which requires hands on experience of infrastructure or rail projects, with and a strong working knowledge of NEC contracts to support the NEC Project Management Team by undertaking Contract Administration and Quantity Surveying duties. You will be supporting the delivery of a major project and will be supported where required by the Project Director and other team members.

We’re looking for someone with the following skills and experience to join our team:

• Quantity Surveying and Cost Management experience on major projects in the infrastructure sector, ideally Rail or relevant Highways or Major Civils experience
• A solid understanding and able to manage estimates, budgets, and feasibility studies throughout the project
• Strong working knowledge of NEC3 and NEC4 contracts, including compensation events, early warnings and change management
• An understanding of procurement, tender analysis, and contract award processes
• Experience in managing post-tender activities including variations, Compensation Events (NEC), and final accounts
• Experience in producing Cost Variance Reports, forecasts, and managing the Contractor invoicing processes
• Experience in managing Contractor/Sub-Contractor accounts and supplier procurement
• Experience of site working including leading contractor meetings and supporting project management teams commercially
• An understanding of compliance processes for Health & Safety, company policies, and contractual obligations
• Monitor committed, forecast and actual expenditure against approved budgets, identifying potential variances and recommending timely corrective action
• Prepare clear and accurate monthly commercial reports covering project costs, cash flow, change, risk, contingency, liabilities and forecast outturn cost
• Lead the preparation, assessment and agreement of valuations, payment applications, payment certificates and final accounts
• Undertake commercial assurance reviews and provide evidence-based advice to clients and project leadership teams
• Excellent commercial awareness, negotiation, analytical and problem-solving skills, with the ability to manage multiple priorities and make informed commercial decisions
• Experience of supporting senior colleagues in maintaining strong stakeholder relationships and supporting business development through exhibiting client focused positive behaviours
• Experience mentoring and developing junior Quantity Surveyors, providing technical guidance and supporting their professional development
• Apply commercial management practices within live rail, station, depot, highways, utilities or other safety-critical infrastructure environments
• Recognise the commercial and programme implications of possessions, isolations, access constraints, operational interfaces, permits, railway standards and stakeholder approvals

Your skills and experience

• Previous experience working as a Senior Quantity Surveyor or Quantity Surveyor within the civils sector
• Client-side experience would be advantageous however experience of Rail or relevant Highways or Major Civils, as Contractor or Consultant, is essential
• Contract knowledge; knowledge of NEC contracts is essential
• Experience of managing, or supporting the management of, contracts in an onsite Main Works Contractor environment
• Commercially aware with excellent reporting and communication skills
• Degree qualified in Quantity Surveying (or equivalent)
• A professional accreditation with a relevant body such as the RICS is desired
• Strong commercial judgement and attention to detail
• A proactive and organised approach to contract administration
• The confidence to challenge constructively and provide independent professional advice
• An ability to identify the key issue within complex commercial and contractual information
• A collaborative approach to working with all stakeholders
• A strong commitment to quality, integrity and professional standards
• The ability to manage competing priorities across several projects or commissions
• A focus on achieving timely decisions, maintaining accurate records and closing out commercial matters
• An understanding of the importance of safety, sustainability, social value and whole-life value in infrastructure investment

The successful candidate will be expected to work on site c50% of the time in the St Albans area for first 2 years of their employment, with opportunities for growth to support other projects regionally and nationally.

Why work for us?

We’re proud to be recognised as a 2024 Times Top 100 Best Companies to Work For, with a culture built around people, inclusion and flexibility. As a Liverpool City Region Fair Employment Charter accredited employer and a Top 100 Most Inclusive Workplaces Index 2026 organisation, we’re committed to creating a workplace where everyone can thrive.

We invest in training and development, support a healthy work-life balance, and celebrate success together, helping our people grow both professionally and personally.

In addition, we also offer:

• 28 days annual leave plus bank holidays
• Private Medical Insurance
• Medicash Cash Plan Scheme
• Annual bonus scheme
• 2 volunteering days per year
• Annual pay review
• Salary sacrifice schemes and discount schemes
• Enhanced maternity and paternity leave
• Enhanced compassionate leave
• Work from home/flexible working
• Birthday lunches

No usual recruitment process

We’re committed to an equal opportunities and inclusive culture for all employees and applicants which values the contribution and potential of every individual, not just what’s on your CV. We welcome applications from everyone and uphold fair, inclusive practices in line with the protected characteristics defined in the Equality Act and we proudly support the trans community.

We recognise everyone has commitments outside work and are happy to discuss flexible working. We will support you throughout the application process. Therefore, if you need any adjustments to our recruitment process, please let us know.

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