Project Quantity Surveyor

Southwark, London
ONYX Fire & Security

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 Manager
• Direct influence over profitability, strategy and operational excellence
• Exposure to high-profile, prestigious estates across London & the UK
• A high-performance, digitally-enabled working environment
• 25 days holiday + bank holidays
• Pension + 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 Control
• Passive Fire Protection
• Fire 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 documentation
• Visiting sites to verify quantities, access, constraints and real-world conditions
• Completing measured surveys for fire doors, fire stopping and passive fire works
• Producing Scope of Works packs and updating cost sheets
• Preparing monthly valuations and signing off works completed on site
• Preparing, negotiating and agreeing variations
• Leading commercial discussions with clients and internal stakeholders
• Overseeing projects under JCT contracts, including variations, claims and disputes
• Managing pricing strategy, margin control and commercial forecasting
• Owning the CVR process and ensuring commercial visibility across each project
• Acting 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 capability
• Excellent document-production and client-facing communication
• Solid Excel/Sheets skills and BOQ understanding
• Proven track record of managing JCT contracts
• Experience managing valuations, variations and financial control
• Chartered Surveyor (RICS) or equivalent
• Experience 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 detail
• Proactive, structured and able to work independently
• Confident in negotiations and client conversations
• Strong leadership potential, capable of developing a junior QS
• Comfortable in a fast-moving, scaling SME environment
• Strategic 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.