Egis Group
Senior Principal Mechanical Engineer - Water / Wastewater
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Senior Principal Mechanical Engineer – UK Water/Wastewater
Company Description
Water | Wastewater | Biosolids/Sludge | AMP 8 | SROs | MEP-Led Team
Shape the Future of Water Infrastructure with Egis
Locations: London | Bristol | Manchester (Hybrid)
Focus Areas: Mechanical Engineering Design | UK-Wide Impact | High-Growth Environment
- Egis, a global leader with 23,500+ experts across 70+ countries, is rapidly expanding its UK Water team. With a mission to deliver intelligent, sustainable infrastructure, the company addresses climate challenges and strengthens community resilience. As part of this growth, Egis is building a high-performing Mechanical Engineering team to shape the evolution of UK water infrastructure.
Job Description
About the Role
The UK water sector is entering a phase of major investment and transformation. To support this, Egis is expanding its UK Water team and constructing a strong Mechanical Engineering capability to deliver national-scale projects.
Applicants must be Driven to help shape the future of UK water and wastewater infrastructure by contributing to mechanically advanced, sustainable, and innovative treatment solutions.
This is an exceptional opportunity to join at a critical point in Egis’ UK journey, establishing and expanding a global-standard mechanical engineering presence with deep expertise in UK water sector delivery.
Key Responsibilities
- Provide senior technical leadership for mechanical discipline within UK water/wastewater treatment design.
- Serve as mechanical discipline lead, sub-lead, or senior technical authority across design, construction, commissioning, and handover phases for complex projects.
- Define and enforce mechanical design standards, including design risk assessments, digital workflows, and quality controls.
- Oversee complex mechanical deliverables, ensuring technical accuracy with equipment strategies, supplier packages, contractor tenders, and multidisciplinary coordination.
- Drive integrated collaboration with Process, EICA (C&EL), Civil/Structural, Architectural, MEP, construction, commissioning, and operations teams.
- Lead client engagements, including technical workshops, optioneering, value engineering, design reviews, and constructability/maintainability assessments.
- Embed modern delivery methods, such as:
- Digital design & BIM/MEP coordination
- Hydraulic analysis & automation
- Standardised processes & data-driven decision-making
- Support project directors and managers with:
- Technical risk management
- Scope development & budgeting
- Programming & resource planning
- Change control & design quality assurance
- Build and develop the mechanical sub-team through:
- Recruitment & mentoring
- Line management & succession planning
- Professional development initiatives
- Strengthen business growth by contributing to:
- Work winning & bid strategies
- Client relationship building
- Market expansion for Egis’ UK water/wastewater capability
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Qualifications
Minimum Requirements
- Qualification: BEng/MEng (or equivalent) in Mechanical Engineering.
- Professional Licensure: Chartered or Incorporated Engineer, registered with a relevant body (e.g., IMechE).
- Experience: 10–12+ years in mechanical engineering design, with water/wastewater/biosolids or oil & gas focus.
- Technical Confidence: Proven project leadership in complex multidisciplinary projects.
- Deep Expertise: Specialised knowledge of:
- Mechanical systems (pumps, pipework, valves, tanks, packaged plant, lifting systems, hydraulics)
- Equipment selection & reliability-based design
- Maintainability & safety-by-design principles
- UK regulated water sector standards (CDM 2015, source control, environmental compliance)
- People Management: Experience in mentoring, recruitment, line management, or resource planning.
- Stakeholder Leadership: Ability to navigate senior technical engagements, influencing project direction with technical credibility.
- Commercial & Programmatic Awareness: Experience in scope management, fee estimation, programme/risk tracking, and change control.
- Digital & Innovation Orientation: Expertise in BIM, MEP coordination, automation, standardised processes, or process optimisation.
Desirable
- Leadership Experience: Previous roles as a technical director, design lead, or sub-team leader in consultancy, contracting, or water/oil & gas businesses.
- Client Network: Strong UK water client relationships, expertise in developing bid strategies, opportunity scoping, and work winning.
- Advanced Engineering Proficiency:
- Digital design for treatment pathways
- Operational analytics, energy/carbon reduction, or modular solutions
- Process Optimisation: Experience leading governance, design standardisation, quality frameworks, or initiative improvement.
- Team Growth: Experience building teams during expansion, including skills mapping, capability planning, and culture development.
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Additional Information
What’s in It for You?
- Challenging growth role with accelerated career progression at a fast-growing UK business.
- Top Employers 2025 recognition—Egis has won prestigious awards for HR excellence across industries.
- Global leader in green infrastructure, driving sustainability in energy, mobility, and water sectors.
- Highly competitive leadership-level remuneration & benefits:
- Hybrid/flexible working
- 26+ days paid annual leave (plus bank holidays)*
- Chartership and professional development support
- Global mobility opportunities
- Inclusive, sustainable culture, prioritising community and environmental impact.
Our Commitment
"We’re committed to our planet, our people, and the future of global water infrastructure." Every project at Egis integrates climate resilience and long-term sustainability. You will be part of a team dedicated to educational and social impact, supported by the Egis Foundation.
Diversity & Inclusion
Egis celebrates global representation and ensures absolute merit-based hiring. Applications considered based on: ✔ Relevant experience ✔ Alignment with essential/desirable criteria
We Are Equal Opportunities Employers Title VII, ADA, GINA, and all other era laws, recognise diverse talent regardless of:
- Age, disability, gender, gender identity/expression, race, religion, sexual orientation, socioeconomic background, and any other protected characteristic.
Business Line: Energy and Sustainable Cities Service Line: Water Technical Region: Europe and Africa Job Family: Engineering Management
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