Project Engineer in London

OnSite is one of the UK’s leading providers of professional contracting services. With a proven track record in the successful delivery of projects and contracts across a broad spectrum of market sectors, OnSite consists of specialist operating areas – drainage, sewer rehabilitation, pipelines, civil engineering, specialist maintenance and rail services.

The Project Engineer is responsible for supporting the technical, commercial, and operational delivery of projects from Early Contractor Involvement (ECI) through to completion. The role acts as a key link between engineering, site operations, commercial teams, suppliers, and clients to ensure projects are delivered safely, efficiently, on time, within budget, and to the required quality standards.

A key focus of the role is providing engineering support during project development and execution, coordinating technical activities, managing documentation, assisting with cost control, and ensuring compliance with project specifications, standards, and contractual requirements.

Key Responsibilities:

• Experience supporting the delivery of water and/or wastewater projects from ECI through to commissioning and handover.
• Strong understanding of engineering principles, technical specifications, drawings, and project documentation.
• Ability to prepare and manage method statements, ITPs, technical submissions, and work packages.
• Experience coordinating activities between design, procurement, construction, and commissioning teams.
• Knowledge of Early Contractor Involvement (ECI), constructability reviews, technical risk assessments, and value engineering.
• Ability to review supplier and subcontractor proposals for technical compliance and project requirements.
• Understanding of project cost control, including cost tracking, forecasting, variations, compensation events, and change management.
• Proficiency in project planning, scheduling, progress monitoring, and preparation of engineering and technical reports.
• Strong stakeholder management skills with the ability to liaise effectively with clients, consultants, subcontractors, suppliers, and internal teams.
• Experience resolving technical queries, managing RFIs, and supporting site activities including surveys, permits, inspections, and commissioning.
• Commitment to Health, Safety, Environment & Quality (HSEQ) standards, including risk assessments, quality management processes, and continuous improvement initiatives.

What You'll Need:

• Degree, HNC/HND, or equivalent qualification in Civil Engineering, Mechanical Engineering, Construction Engineering, or a related discipline.
• Experience within water, wastewater, utility, tunnelling, rehabilitation, or infrastructure projects.
• Understanding of project delivery processes from design through construction and handover.
• Ability to interpret technical drawings, specifications, and contract documentation.
• Strong commercial awareness with experience supporting cost management and project controls.
• Proficiency in Microsoft Office applications, particularly Excel.
• Strong problem-solving and analytical skills.
• Excellent communication and organisational abilities.
• Experience working within the trenchless technology, UV lining, or sewer rehabilitation sector.
• Knowledge of NEC contracts and change management processes.
• Understanding of temporary works and construction methodologies.
• Site-based engineering experience.
• CSCS, SMSTS, SSSTS, or equivalent industry qualifications.
• Experience of working within highly regulated environments such as airports, water utilities, or critical infrastructure.
• Experience using project planning and reporting tools such as MS Project, Primavera P6, or equivalent.

What You'll Get:

• Family-Friendly Leave: Enhanced Maternity, Adoption, Paternity & Shared Parental Leave, Fertility Support, and up to 5 paid Carer’s Days.
• Financial & Life Assurance: Company Pension Scheme with salary sacrifice options.
• Health & Wellbeing: Employee Assistance Programme and 24/7 Virtual GP access for you and your dependents.
• Lifestyle & Perks: Cycle to Work Scheme and My Premier Benefits discounts, cashback, and vouchers.
• Professional Development: Hands-on training and ongoing career development opportunities.
• Inclusion & Belonging: Active People Networks – Disability & Neurodiversity, Unity+, Women’s Network, Parent & Carer Networking Group and more.
• Performance & Recognition: Annual salary review, Reward & Recognition Scheme, and Long Service Awards.

At South Staffordshire Group, inclusion matters. We have a wide range of employee networks which are employee-led communities that bring our people together, support different perspectives and create a strong sense of belonging. Our people are encouraged to get involved as members or allies. We are committed to building a team that reflects the diversity of the communities we serve. We warmly welcome applications from candidates of all backgrounds, including all genders, ethnicity, sexual orientations, and physical and neurodiverse abilities. We are happy to discuss reasonable adjustments and encourage you to let us know how we can best support you throughout the recruitment process.