Senior Mechanical Engineer - Water​/Wastewater

Senior Mechanical Engineer – UK Water/Wastewater

Water | Wastewater | Biosolids/Sludge | AMP 8 | SROs | MEP‑Led Team

Shape the Future of Water Infrastructure with Egis

• London | Bristol | Manchester (Hybrid)
• Mechanical Engineering Design | UK‑Wide Impact | High‑Growth Environment

Egis is expanding rapidly in the UK, backed by a global team of more than 23,500 experts across 100+ countries. We design and deliver intelligent, sustainable infrastructure to address climate challenges and strengthen community resilience. As part of our fast‑growing UK Water team, you will join an agile environment where progression is quick, visibility is high, and your impact is immediate.

The UK water sector is entering a period of unprecedented investment and transformation. As Egis accelerates the growth of its Water Business in the UK, we are building a high‑performing Mechanical Engineering team to help shape this next chapter.

We are inviting applicants who want to play a meaningful role in delivering major water and wastewater programmes in the UK. Working within a collaborative, multidisciplinary environment, you will contribute to technically robust, sustainable and innovative treatment solutions across nationally significant projects.

This is a rare opportunity to join at a key stage of our UK growth journey, helping to establish, shape and expand a Mechanical engineering capability built on Egis’ global infrastructure expertise and long‑term commitment to the sector.

• Lead defined mechanical design tasks or work packages across feasibility, optioneering, concept, outline and detailed design.
• Prepare, check and coordinate mechanical deliverables including calculations, specifications, datasheets, schedules, P&IDs, layouts, design reports and procurement documentation.
• Take ownership of assigned mechanical packages, managing technical quality, interfaces, scope, budget, programme and change.
• Lead site surveys, data reviews and technical discussions with clients, operators, suppliers, contractors and technology providers.
• Develop mechanical solutions for pumps, pipework, valves, tanks, lifting systems, screens, grit removal, odour control, packaged plant and associated treatment assets.
• Coordinate interfaces with Process, EICA, civil/structural, architectural and construction teams, including MEP integration, access, lifting, maintainability and constructability.
• Support CDM/safety‑by‑design reviews, HAZOP/SWIFT input, technical risk management, commissioning strategies and performance testing.
• Review supplier/contractor submissions, respond to technical queries and support construction, commissioning and handover where required.
• Mentor Engineers and Graduates and contribute to mechanical standards, templates and delivery improvements.

• BEng/MEng or equivalent in Mechanical Engineering.
• Chartered Engineer status, or significant CEng‑level experience while actively progressing towards chartership.
• Typically 6+ years’ relevant mechanical engineering design experience.
• Background must be from water, wastewater, biosolids/bioresources or oil & gas.
• Proven ability to deliver mechanical design packages within multidisciplinary projects.
• Strong practical experience with mechanical equipment selection, pumping systems, pipework, valves, hydraulics, layouts and packaged plant.
• Ability to prepare and check mechanical calculations, specifications, datasheets, schedules, reports, drawings and procurement documentation.
• Working knowledge of UK water industry standards, CDM 2015, safety‑by‑design and relevant mechanical requirements.
• Good commercial awareness and ability to deliver to agreed scope, budget and programme.
• Strong communication skills, including ability to lead technical discussions and present recommendations clearly.

• Experience with AMP8, WINEP, SROs, D&B, framework, alliance or major capital delivery environments.
• Experience in sludge/bioresources, water reuse, pumping stations, energy recovery, odour control, chemical dosing, package plant, offsite manufacture or low‑carbon mechanical solutions.
• Experience with BIM/3D coordination, hydraulic…