Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Support Project Managers in delivering innovative UV lining projects and coordinating teams.
- Company: Join a leading water utility group with a strong focus on career development.
- Benefits: Enjoy family-friendly leave, health support, and professional development opportunities.
- Why this job: Make a real impact in the water industry while growing your project management skills.
- Qualifications: Degree in Engineering or Project Management and experience in project coordination.
- Other info: Flexible working options and a vibrant company culture await you!
The predicted salary is between 40000 - 50000 £ per year.
This is a fantastic opportunity to contribute to one of the water industry’s most critical challenges while developing your expertise across data, network operations, and strategic resolution planning. Onsite is part of the South Staffordshire Group – a 3,000-strong organisation behind South Staffs Water, Cambridge Water, and several leading utility support businesses – offering long‑term development and career progression.
We’re looking for an Assistant Project Manager to support the delivery of specialist UV lining projects, working alongside experienced Project Managers from Early Contractor Involvement (ECI) through to completion. This is a great opportunity for someone with strong commercial awareness and project coordination experience who’s looking to develop into a full Project Manager role.
The Role
- Supporting Project Managers with planning, coordination, and delivery of UV projects
- Assisting with project execution plans, programmes, and schedules
- Coordinating with engineering, procurement, fabrication, and commissioning teams
- Supporting site activities, meetings, and inspections where required
- Assisting during the ECI phase, including scope definition, risk reviews, and constructability input
- Supporting cost estimates, budgets, pricing models, and supplier evaluations
- Tracking value of works completed (VOWD) and supporting monthly cost reporting
- Monitoring costs, variations, forecasts, and margin performance
- Supporting invoicing, progress claims, and change management
- Preparing project reports, dashboards, and maintaining project documentation
- Supporting HSEQ requirements and promoting a strong safety culture
Essential What you’ll need:
- Qualification in Engineering, Project Management, Construction Management, or similar
- Experience in a project support or coordination role within UV, water/wastewater, industrial, or process environments
- Understanding of ECI project delivery models
- Strong numerical and analytical skills with experience in cost tracking and margin control
- Ability to manage multiple tasks across concurrent projects
- Proficiency with tools such as MS Project, Excel, and ERP systems
Desirable
- Experience within the UV treatment or water infrastructure sector
- Exposure to contract administration and progress claims
- Knowledge of value engineering and cost optimisation techniques
What You’ll Get In Return
- Family‑Friendly Leave – Enhanced Maternity, Adoption, Paternity & Shared Parental Leave, Fertility Support, and up to 5 paid Carer’s Days.
- Financial & Life Assurance – Life Assurance cover (role dependent) and a Company Pension Scheme with salary sacrifice options.
- Health & Wellbeing – Employee Assistance Programme (8 counselling sessions) 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.
- Flexibility & Opportunities – Overtime available and flexible shifts / hybrid working (role dependent).
Assistant Project Manager in London employer: OnSite Central Limited
Contact Detail:
OnSite Central Limited Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Assistant Project Manager in London
✨Tip Number 1
Network like a pro! Reach out to people in the industry, attend events, and connect on LinkedIn. You never know who might have the inside scoop on job openings or can put in a good word for you.
✨Tip Number 2
Prepare for interviews by researching the company and its projects. Show us that you understand their work in UV lining and water management. Tailor your answers to highlight how your skills fit their needs.
✨Tip Number 3
Practice makes perfect! Do mock interviews with friends or family to build confidence. Focus on articulating your project coordination experience and how it aligns with the Assistant Project Manager role.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, we love seeing candidates who are proactive about their job search.
We think you need these skills to ace Assistant Project Manager in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Assistant Project Manager role. Highlight your project coordination experience and any relevant qualifications in Engineering or Project Management. We want to see how your skills match what we're looking for!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about the water industry and how your background makes you a great fit for our team. Keep it concise but engaging – we love a good story!
Showcase Your Skills: Don’t forget to showcase your numerical and analytical skills, especially if you have experience with cost tracking and margin control. Mention any tools you’re proficient in, like MS Project or Excel, as these are key for the role.
Apply Through Our Website: We encourage you to apply through our website for the best chance of getting noticed. It’s super easy, and you’ll be able to keep track of your application status. Plus, we love seeing applications come directly from our site!
How to prepare for a job interview at OnSite Central Limited
✨Know Your Projects
Before the interview, make sure you understand the specifics of UV lining projects and how they fit into the water industry. Research the company’s past projects and be ready to discuss how your experience aligns with their needs.
✨Showcase Your Coordination Skills
Be prepared to talk about your project coordination experience. Use specific examples where you successfully managed multiple tasks or supported project managers. Highlight your proficiency with tools like MS Project and Excel, as these are crucial for the role.
✨Demonstrate Commercial Awareness
Understand the financial aspects of project management, such as cost tracking and margin control. Be ready to discuss how you’ve contributed to budget management in previous roles, as this will show your readiness for the responsibilities of an Assistant Project Manager.
✨Ask Insightful Questions
Prepare thoughtful questions about the company’s approach to ECI and project delivery models. This not only shows your interest but also gives you a chance to demonstrate your understanding of the industry and the role.