Principal Mechanical Engineer - Water, Wales

At Jacobs, we are challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission‑critical outcomes, operational advancement, scientific discovery, and cutting‑edge manufacturing, turning abstract ideas into realities that transform the world for good.

This is a rare chance to step into a newly created role at the forefront of the UK’s most significant water sector transformation. If you’re driven by meaningful engineering challenges and want your work to directly improve the lives of millions, you will be at the heart of it.

• Collaborate with major water companies, including United Utilities, Northumbrian Water, Thames Water, Severn Trent Water, and Anglian Water, shaping and delivering high‑value, complex Design & Build CAPEX and OPEX programmes.
• Mechanical design for critical water and wastewater assets — from pumping stations to treatment plants.
• Value engineering and buildability improvements that make real‑world impact.
• Feasibility studies, detailed designs, and commissioning support for major infrastructure.
• High‑quality technical outputs including layouts, specifications, datasheets, and P&IDs.
• Equipment sizing and specification across pumps, blowers, valves, screening, dosing, and odour control systems.
• Site investigations and engagement with clients, contractors, and suppliers.
• Achieve compliance with UK water industry standards, health & safety, and environmental requirements.
• Technical guidance, mentoring, and collaboration within multidisciplinary teams.
• Project planning support including scheduling, risk, change control, and forecasting.
• Early integration of constructability and commissioning into design solutions.

• Degree in Mechanical Engineering.
• Professional Membership: Working toward or holding chartered status (e.g., IMechE or equivalent).
• Strong understanding of mechanical process basrd systems used in sectors such as water/wastewater/effluent/biomass treatment.
• Knowledge of UK water industry standards, H&S, and environmental compliance.
• Robust understanding of current health, safety and welfare legislation.
• Experience across the project lifecycle within infrastructure or similar complex environments.
• Familiarity with design tools such as AutoCAD, Revit, or BIM (advantageous).

Flexible working arrangements, well‑being benefits, a global giving and volunteering program, and opportunities for career growth within a global company.

Jacobs is a disability confident employer and welcomes applicants from all backgrounds. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.