Egis Group
Senior Principal Mechanical Engineer - Water / Wastewater
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Company Description
Egis is expanding rapidly in the UK, backed by a global team of more than 23,500 experts across 70+ countries. We design and deliver intelligent, sustainable infrastructure to address climate challenges and strengthen community resilience.
Senior Principal Mechanical Engineer – UK Water/Wastewater
Location: London | Bristol | Manchester (Hybrid) Industries: Water | Wastewater | Biosolids/Sludge | AMP 8 | SROs | MEP-Led Team Focus Areas: Mechanical Engineering Design | UK-Wide Impact | High-Growth Environment
Job Description
About the Role
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.
You will join an agile environment where progression is rapid, visibility is high, and your impact is immediate. This is a rare opportunity to join at a critical 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.
Key Responsibilities
- Provide senior technical leadership for the mechanical discipline within the UK water/wastewater treatment design team.
- Act as mechanical discipline lead, sub-lead, or senior technical authority on complex treatment projects across:
- Design
- Construction support
- Commissioning
- Handover
- Set and maintain mechanical design standards, including:
- Checking requirements
- Design risk processes
- Digital workflows
- Quality expectations
- Lead and assure complex mechanical deliverables, including:
- Key technical decisions
- Equipment strategies
- Supplier packages
- Contractor submissions
- Multidisciplinary interfaces
- Drive integrated coordination across:
- Process teams
- EICA (Electrical, Instrumentation, & Control Automation)
- Civil/structural
- Architectural
- MEP (Mechanical, Electrical, Plumbing)
- Construction teams
- Commissioning and operations teams
- Lead senior client engagement, including:
- Technical workshops
- Optioneering
- Value engineering
- Design reviews
- Constructability/maintainability reviews
- Embed modern delivery approaches, such as:
- Digital design
- Hydraulic analysis
- BIM/3D coordination
- Automation
- Standardisation
- Data-led decision-making
- Supplier integration
- Support project directors and project managers with:
- Technical risk management
- Scope development
- Resource planning
- Programme planning
- Budget oversight
- Change control
- Design quality assurance
- Build and develop the mechanical sub-team, including:
- Recruitment
- Mentoring
- Line management
- Succession planning
- Professional development
- Support business planning, work winning, and client development by spearheading:
- Bid strategies
- Growth of Egis’ UK water/wastewater treatment capability
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Qualifications
Minimum Requirements
- BEng/MEng or equivalent in Mechanical Engineering.
- Chartered Engineer or Incorporated Engineer status with a relevant professional institution (e.g., IMechE).
- Typically 10–12+ years’ relevant mechanical engineering design experience.
- Background must be from:
- Water
- Wastewater
- Biosolids/bioresources or oil & gas
- Proven track record leading mechanical design and technical assurance on complex multidisciplinary projects.
- Deep technical expertise in:
- Mechanical treatment/process systems
- Pumps
- Pipework
- Valves
- Tanks
- Packaged plants
- Lifting systems
- Hydraulics
- Maintainability
- Strong understanding of:
- UK water sector drivers
- Water company asset standards
- CDM 2015
- Safety-by-design
- Environmental/regulatory requirements
- Deliberation models
- Demonstrated experience developing people such as:
- Mentoring
- Line management
- Technical coaching
- Recruitment
- Resource planning
- Strong client and stakeholder management skills, with credibility to:
- Lead senior technical conversations
- Influence project direction
- Strong commercial and delivery expertise, including:
- Scope development
- Fee estimating
- Programme/resource planning
- Risk management
- Change control
- Strong digital and innovation mindset, with experience embedding:
- Improved tools
- Data workflows
- BIM/MEP coordination
- Hydraulic analysis
- Automation or standardised delivery approaches
Desirable Skills / Knowledge
- Experience as:
- Mechanical discipline lead
- Design manager
- Technical director
- Associate-level lead
- Sub-team lead
- Within consultancies, contractors, water companies, technology providers
- Oil & gas/process engineering businesses
Get help with your application
Your very own career expert that helps elevate your application to the next level.
-
Strong UK water sector client network, including:
- Account growth
- Opportunity shaping
- Bid leadership
- Work winning
-
Knowledge of:
- Digital treatment design
- Process optimisation
- Operational intelligence
- Energy/carbon reduction
- Modular/offsite solutions
- MEP-led design delivery
-
Experience leading:
- Mechanical technical governance
- Communities of practice
- Design standards
- QA frameworks
- Delivery improvement initiatives
-
Experience building teams during growth phases, including:
- Skills mapping
- Capability planning
- Creating a positive, delivery-focused culture
Additional Requirements
- Candidates must have the right to work in the UK.
What’s in It for You?
- An exciting new growth role within a fast-organic growing UK business, offering:
- Clear and accelerated career progression
- Top Employers 2025 certification, recognised across continents for excellence in HR practices — Egis has received this prestigious award.
- A global leader in green infrastructure, innovating cross-value-chain to help achieve sustainable built environments.
- Highly competitive leadership-level reward package.
- Flexible, hybrid working options.
- 26+ days annual leave plus bank holidays.
- Access to professional development, chartership support, and global mobility opportunities.
- A supportive, inclusive culture driven by sustainability and long-term community impact.
Why Join Egis?
"Ready to Lead?"
This is your opportunity to play a pivotal role in shaping the future of sustainable water infrastructure across the UK. Egis supports this vision through the Egis Foundation, which funds global initiatives to:
- Address the climate crisis
- Promote educational and social initiatives driven by sustainability
- Facilitate a responsible and sustainable transition.
As an Equal Opportunities employer, Egis strives to build a workforce that reflects its communities. We welcome applications from candidates of any background. Selection is based purely on:
- Experience
- Essential and desirable criteria
- Suitability for the role
Your contribution shapes our culture and fosters an environment where you’ll feel valued, heard, and respected. Together, we can create lasting change.
Business Line: Energy & Sustainable Cities Service Line: Water Technical Region: Europe & Africa Job Family: Engineering Management
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