Sub Agent Location: North West London Rate: £500-£600 per day (Inside IR35) Contract Length: 12 months Sector: Rail / Civil Engineering Infrastructure Employer: Tier 1 Main Contractor The Opportunity Our client, a leading Tier 1 contractor, is seeking an experienced Sub Agent to support the delivery of a major rail infrastructure project. This contract opportunity will focus on managing complex construction packages including reinforced concrete works, drainage, structural steel, temporary works, architectural fit-out, shafts and headhouses. The successful candidate will be responsible for ensuring works are delivered safely, to programme, within budget and in accordance with strict quality requirements on a large-scale rail project. Key Responsibilities Support the Agent and Project Manager in delivering key project milestones. Manage and coordinate site operations, engineering teams and subcontractors. Oversee construction activities involving: Reinforced Concrete Structures Drainage Works Concrete Walls and Slabs Structural Steel Installation Temporary Works Architectural Fit-Out Packages Shafts and Headhouses Ensure all works are delivered in accordance with approved construction methodologies and project requirements. Review and approve RAMS, ITPs and work package plans. Monitor progress against programme and implement recovery actions where necessary. Drive health, safety, environmental and quality performance on site. Liaise with designers, commercial teams, subcontractors and client representatives. Support cost control, reporting and change management processes. Ensure compliance with project specifications, standards and contractual obligations. Essential Experience Minimum 10 years' construction or civil engineering experience. Minimum 5 years' experience operating as a Sub Agent on major infrastructure projects. Proven experience delivering works within rail, heavy civils, tunnelling or major infrastructure environments. Demonstrable experience managing: Construction Fit-Out Reinforced Concrete Drainage Concrete Walls and Slabs Structural Steel Temporary Works Architectural Fit-Out Shafts and Headhouses Experience working for Tier 1 contractors on large and complex infrastructure projects. Strong understanding of construction sequencing, planning, temporary works coordination and subcontractor management. Ability to manage multiple work fronts and deliver against challenging programme requirements. Essential Qualifications & Certifications SMSTS CSCS Card Person Specification Strong leadership and team management skills. Excellent communication and stakeholder engagement abilities. Proactive and solutions-focused approach to project delivery. Strong commercial and contractual awareness. Ability to work effectively in a fast-paced project environment. Commitment to maintaining the highest standards of safety, quality and performance