Quantity Surveyor - Oil & Gas | Site-Based (Essex)We're looking for an experienced Quantity Surveyor with a strong background in mechanical / piping (and some exposure to electrical works) to join a high-profile brownfield upgrade project in the oil & gas sector.This is a site-based role, working directly within the principal contractor's project management team, and reporting client-side - a rare opportunity to gain direct exposure and influence at project level. You'll be responsible for commercial oversight across piping, mechanical, and EC&I scopes, ensuring smooth project delivery from change management through to close-out.Why Join?Client-side role - embedded within the project leadership team, offering visibility and impact.Outside IR35 - attractive day rate plus allowances.Collaborative team culture - work alongside a professional and supportive project management team.Straightforward, well-defined project - technically manageable yet commercially rewarding.What We're Looking ForDegree-qualified Quantity Surveyor or MRICS (preferred)10-15 years' experience in quantity surveying, with focus on piping / mechanical and electrical packagesProven track record on brownfield upgrade projects in the oil & gas sectorStrong grasp of JCT contract administration, change management, and project close-outHigh proficiency in Microsoft Excel (intermediate to advanced)Strong interpersonal and communication skillsSelf-motivated, capable of working independently with minimal supervisionRole DetailsLocation: Site-based, Southeast England (Essex) - full-time presence (minimum 5 days/week)Duration: 9-month contractHours: 10-hour working days, site hours 07:00 - 17:00Rotation: 21/7Package: Outside IR35, day rate + £125/day subsistence allowance