Project Quantity Surveyor

We're growing fast and we're looking for a commercially strong, operationally sharp Senior Project Quantity Surveyor to help shape the next stage of our journey.

We are looking for someone to take ownership of all post-award commercial and scope-validation activities once a project is marked "Closed Won" in Salesforce. This includes verifying the BOQ, undertaking site surveys, preparing operational scopes and cost sheets, managing valuations, and ensuring commercial control throughout the delivery of fire doors, fire stopping, and wider passive fire protection projects.

Why Join Us?

This isn't just another QS role, it's a chance to shape the commercial direction of a growing specialist contractor.

You'll get:

A pathway to Commercial ManagerDirect influence over profitability, strategy and operational excellenceExposure to high-profile, prestigious estates across London & the UKA high-performance, digitally-enabled working environment25 days holiday + bank holidaysPension + ongoing development opportunities

About Onyx Fire & Security

Onyx Fire & Security is one of the UK's leading fire safety specialists, delivering critical life-safety systems across commercial, residential and hotel & leisure sectors.

Since 2008, we've focused on creating safer buildings through:

Mechanical & Electrical Smoke ControlPassive Fire ProtectionFire Engineering & Asset Management

We're a growing, ambitious SME with a strong operational culture and this role will be central to shaping our commercial success as we scale.

The Role: 

As our Senior Operational QS, you will be the commercial lead from the moment a project becomes live.

You'll take full ownership of scope validation, operational documentation, commercial controls and ongoing financial performance backed by a junior QS reporting into you.

You'll work closely with the Head of Projects while overseeing project values from £200k to £3m, typically lasting 2-10 months.

What You'll Be Responsible For

Validating sold scopes and converting BOQs into operational documentationVisiting sites to verify quantities, access, constraints and real-world conditionsCompleting measured surveys for fire doors, fire stopping and passive fire worksProducing Scope of Works packs and updating cost sheetsPreparing monthly valuations and signing off works completed on sitePreparing, negotiating and agreeing variationsLeading commercial discussions with clients and internal stakeholdersOverseeing projects under JCT contracts, including variations, claims and disputesManaging pricing strategy, margin control and commercial forecastingOwning the CVR process and ensuring commercial visibility across each projectActing as a trusted commercial advisor to the Head of Projects

Scope & Costing Documentation

Produce a formal Scope of Works Pack, including drawings, schedules, measured surveys and technical clarifications.Prepare the Operational Costing Sheet, including labour, materials, access requirements, prelims, and subcontractor packages.Clean up / restructure sales BOQs to ensure operational clarity and compliance with BM Trada / ASFP / project-specific requirements.

Stakeholder & Client Interface

Liaise with Project Managers, Site Managers, Sales, and the Client team to ensure all commercial matters are managed professionally.Respond to commercial queries, RFIs, and contract-related correspondence.Support the operational team in delivering high-quality, compliant works in line with the programme.

Compliance & Quality

Ensure all commercial outputs align with compliance frameworks (BM Trada, ASFP, Building Safety Act, and client-specific standards).Support the creation of design packs and technical documentation where required.

About You: 

The Person Who Will Excel Here

We're looking for someone who combines commercial sharpness with operational instinct, someone who thrives in a role with both structure and autonomy.

Experience & Technical Strengths

5+ years QS experience (ideally in fire protection or a specialist MEP subcontractor)Strong measured survey capabilityExcellent document-production and client-facing communicationSolid Excel/Sheets skills and BOQ understandingProven track record of managing JCT contractsExperience managing valuations, variations and financial controlChartered Surveyor (RICS) or equivalentExperience working with Salesforce, OneTrace, Procore or similar systems.Understanding of BM Trada schemes / ASFP guidance / BSA Golden Thread requirements.Full UK driving licence.

Traits & Mindset

Commercially ambitious with strong attention to detailProactive, structured and able to work independentlyConfident in negotiations and client conversationsStrong leadership potential, capable of developing a junior QSComfortable in a fast-moving, scaling SME environmentStrategic thinker with the ability to forecast, challenge and improve processes

How to Apply:

If you are intersted in this position and would like to learn more we would love to hear from you.  Please attach your CV to the link provided and we will be in contact.