WSP in the UK & Ireland
Principal / Associate Wastewater Process Engineer
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Principal / Associate Wastewater Process Engineer
Associate Wastewater Process Engineer
WSP –*
About the Role
Prove your worth and help shape a career that matters to you. At WSP, you’ll find a workplace full of opportunity, designed to let you thrive professionally while you make a real-world difference. Our global reach means you can discover new challenges and collaborate with bright, driven people—all while growing your skills and expanding your horizons.
As the demand for engineering expertise continues to rise, we’re seeking an experienced Associate Waste Water Process Engineer to join our high-performing water engineering teams in Birmingham, Bristol, Manchester, Liverpool, London, Newcastle or Glasgow.
Key Responsibilities
You’ll play a central role in delivering process engineering design content for a diverse range of water engineering projects—including wastewater treatment and water reuse schemes—both in the UK and internationally. Here’s what success will look like:
- Design, review and optimise:
- Optioneering studies, process flow diagrams, mass balances, and piping & instrumentation drawings (P&IDs)
- Sketches, basis of design reports, and project-specific deliverables
- Execute outline to detailed process engineering design
- Compulsory site visits for data collection, operator meetings and operational assessments
- Technical procurement input, including supplier proposal reviews and bid support
- Client consultations—.position yourself as the trusted technical partner to project managers
- Vendor and technology-provider negotiations (mostly biological/chemical treatment, advanced filtration, and sludge processing)
- Engage in HAZOP, HAZID, ENVID and SWIFT sessions for risk and environmental assessments
- Mentor and lead junior engineers, providing technical guidance and quality assurance
- Collaborate across multi-disciplinary teams—aligning process engineering solutions with broader project objectives (budget, timeline, quality)
- Bid support: contribute process-engineering scope, schedules, and budget inputs to project proposals
- Act as client liaison—ensuring technical outcome(s) meet stakeholder expectations
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What We’re Looking for
We’re looking for a proven process design leader with a proven track record in the municipal/industrial water sector:
Core Experience
- Hands-on experience in leading process engineering for infrastructure projects in wastewater treatment or reuse.
- Competition to deliver high-calibre design work—technical specifications, P&IDs, mass balances, process control philosophies, HAZOP reports.
- Expertise in municipal treatments: primary, secondary (ASP, MBBR, MBR), tertiary (filtration, P removal, clarification) and advanced biochemical processes (chemical dosing, eutrophication mitigation).
- Understanding of circular economy principles (e.g., nutrient/energy recovery, zero liquid discharge (ZLD) systems) and emerging tertiary treatments strategies.
- Consultancy experience as a process engineer—providing clear technical communication (reports presentations) to stakeholders.
Critical Skills ✔ Process design autonomy—comfortability preparing reports, delivering presentations, and interfacing with clients/subcontractors. ✔ Technical leadership—evolve from hands-on engineer to mentoring/supervising younger talent in water treatment. ✔ Structured problem-solving—analysing operational performance, deriving actionable engineering solutions. ✔ Strong grasp of regulatory standards, environmental compliance and safety critiques in wastewater operations.
Participation & Mobility
- Commitment to rotational travel (eg. themed cross-UK or international site visits)—all while adhering to safe working practices.
- Adaptability to diverse project demands across multiple locations.
No one’s skillset is perfectly matched—apply anyway! If you have any relevant experience building advanced treatment systems or lead long-term value engineering, you may still be the missing piece.
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Why WSP?
It’s a global reputation, but more importantly, it’s the collective impact you’ll make: ✔ Bring solutions to high-profile projects where dropout could impact markets, conservation, and commerce. ✔ Grow your network with industry-leading engineers while unlocking your potential for high-impact leadership. ✔ Build a career where you’re proud of your technical legacies, teamwork, and client satisfaction.
Your Benefits
• Work-Life Balance: A two-days-a-week hybrid policy, flexible scheduling, and WSP My Hour++ au vissou. • Inclusion & Belonging: Activate a culture of authenticity & respect through our Employee Resource Groups (ERGs)—celebrating your worth on all levels. • Health & Wellbeing:
- 24/7 Virtual GP access (NHS/medical support).
- Gymflex (enrol online/travel discounts) and comprehensive menopause/mental health support programmes.
- Career flexibility if you ever need it (reasonable workplace adjustments). • Professional Development:
- Mentorship/career terrace plans carried forward in your professional organisation.
- Pathway into APICS & relevant Chartered Institute schemes (CIWEM, IEMA). • Global opportunities: Size landmark infrastructure projects worldwide (scoping the next-gen water treatment landscape).
WSP is steadfast in its commitment to diversity, equity & equity. We encourage applications from all backgrounds—no qualification, age or typology exclusions required. Our Disability Confident Leader status means you’ll hear from us if adjustments make a key difference when it comes to evaluation or progress. (Let us know if there’s anything we can do to simplify the process.)
Apply today—ready to change lives, systems and your own trajectory?
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