Egis Group
Principal Mechanical Engineer - Water / Wastewater
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Principal Mechanical Engineer – UK Water/Wastewater
Company Description Egis is expanding rapidly in the UK, backed by a global team of over 23,500 experts across 70+ countries. We specialise in designing sustainable infrastructure to combat climate challenges and boost community resilience.
Form part of our **fast-growing UK Water team, where career progression is quick, visibility is high, and your impact is immediate.
About the Role
The UK water sector is entering a phase of major investment and transformation. As Egis accelerates its Water Business in the UK, we are building a high-performing Mechanical Engineering team to lead this evolution.
We’re seeking applicants who want to contribute meaningfully to major UK water and wastewater programmes. In a collaborative, multidisciplinary environment, you’ll shape technically robust, sustainable, and innovative treatment solutions across nationally significant projects.
This is a unique opportunity to join at a critical stage in Egis’ UK growth, helping establish, shape, and expand a mechanical engineering capability built on global infrastructure expertise and long-term sector commitment.
Key Responsibilities
Technical Leadership & Design
- Lead mechanical design delivery on multidisciplinary water/wastewater treatment projects across the full design lifecycle.
- Act as mechanical technical lead, overseeing design strategy, key decisions, interfaces, risks, and deliverable quality.
- Review and approve mechanical calculations, specifications, datasheets, reports, P&IDs, layouts, schedules, drawings, and supplier/contractor submissions.
- Lead equipment selection and mechanical design for pumps, pipework, valves, tanks, lifting systems, packaged plant, treatment equipment, and process systems.
Technical Reviews & Workshops
- Lead mechanical input for optioneering, value engineering, design reviews, HAZOP/SWIFT, constructability, maintainability, and commissioning reviews.
- Drive multidisciplinary coordination with Process, EICA, Civil/Structural, Architectural, MEP, Construction, and Operations teams.
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Digital & Lean Delivery
- Promote digitally enabled delivery through blended information modelling (BIM), 3D coordination, hydraulic analysis, data-led design, and reusable templates.
- Provide technical assurance and support project managers on risk, scope, resourcing, programming, and change control.
Team & Growth Mentorship
- Mentor and manage engineers, supporting recruitment, development, and chartership progression.
- Contribute to bids, client engagement, opportunity shaping, and growth of mechanical capability.
Qualifications
Minimum Requirements
- BEng/MEng or equivalent in Mechanical Engineering.
- Chartered Engineer or Incorporated Engineer status with a relevant institution (e.g., IMechE).
- 8–10+ years of relevant mechanical engineering design experience, preferably in water, wastewater, biosolids/bioresources, or oil & gas.
- Proven ability to act as mechanical discipline lead or senior technical lead on multidisciplinary projects.
- Strong expertise in mechanical treatment/process systems, including:
- Equipment selection, pumping systems, pipework, valves, hydraulics, layouts, and packaged plant.
- Deep understanding of UK water industry standards, CDM 2015, safety-by-design, regulatory drivers, and typical delivery models.
- Ability to coordinate multidisciplinary interfaces and resolve complex mechanical design challenges.
- Digital mindset, with experience in modelling, automation, BIM/3D, data-led design, or workflow standardisation.
- Confident client-facing communicator, skilled in leading workshops, technical reviews, and design discussions.
- Experience in mentoring engineers and developing technical capability.
Desirable Skills/Knowledge
- Deep expertise in:
- Wastewater treatment, clean water treatment, sludge/bioresources, water reuse, pumping stations, chemical dosing, odour control, energy recovery, or package plant.
- Experience with AMP8, WINEP, SRO, D&B, framework, alliance, or contractor-led projects.
- Ability to develop mechanical design standards, calculation tools, equipment specs, QA processes, or reusable digital workflows.
- Contributions to recruitment, resourcing, bid writing, technical proposals, client presentations, or new service development.
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Additional Notes
- EUSS/HGP visa holders may be eligible for this role.
- You must have the right to work in the UK to be considered.
What’s in It for You?
- Fast-track career progression in a high-growth UK business.
- Top Employer 2025 global recognition for excellence in HR practices.
- A global leader in green infrastructure, driving sustainable mobility, energy, and built environment solutions.
- Leadership-level reward package.
- Hybrid and flexible working.
- 26+ days annual leave + UK bank holidays.
- Support for professional development, chartership bids, and global mobility.
- Inclusive, forward-thinking culture focused on sustainability and social impact.
Ready to Lead?
Shape the future of water infrastructure by joining Egis, where your expertise will help transform the UK (and the world) into a more sustainable future.
Our Commitment to the Planet & People
Through our Egis Foundation, we fund climate action, education, and social initiatives driving a sustainable shift. Explore our carbon reduction strategies and sustainable procurement tools here.
Diversity & Inclusion
As an Equal Opportunities employer, we celebrate diversity in all forms—age, disability, gender identity, race, religion, sexual orientation, and beyond. Applications are assessed purely on experience, requirements, and role fit.
Business Line: Energy & Sustainable Cities Service Line: Water Technical Region: Europe & Africa Job Family: Engineering Management
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