WSP in the UK & Ireland
Principal / Associate Wastewater Process Engineer

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Principal / Associate Wastewater Process Engineer
Senior Wastewater Process Engineer (Associate) – Water & Wastewater Engineering
About the Role
At WSP, we empower you to shape a career as unique as your ambitions. With a global network and a mission to positively impact communities worldwide, we invite experienced professionals to join us. An opportunity has emerged for a Senior Wastewater Process Engineer (Associate) to lead process engineering design across UK and international projects, including wastewater and water reuse solutions.
Based in Birmingham, Bristol, Manchester, Liverpool, London, Newcastle, or Glasgow, you will collaborate in multidisciplinary teams to deliver cutting-edge, client-focused water solutions—from feasibility studies to detailed design, procurement, and construction.
Responsibilities
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Process Design Leadership
- Develop key deliverables including optioneering studies, mass balances, P&IDs, basis of design reports, and technical specifications to optimise project outcomes.
- Conduct outline and detailed process engineering design for projects spanning municipal and industrial wastewater treatment, such as primary/secondary/tertiary treatments (MBR, MBBR, ASP, membrane filtration, chemical dosing).
- Contribute to advanced concepts, including circular economy, Zero Liquid Discharge (ZLD), and emerging tertiary treatments.
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Project & Client Collaboration
- Attend site visits for data collection, meeting operators to assess requirements and performance.
- Provide technical input during procurement, liaise with vendors, technology providers, and clients (both internally and externally).
- Attend/drive HAZOP, HAZID, ENVID, and SWIFT studies to ensure safety and risk mitigation.
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I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?
Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.
Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.
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Graduate Consultant — 2026 Scheme
Why you're a good match
StrongYour economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.
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Why you're a good match
You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.
Experience fit
Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.
Only hits
No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.
- Technical & Team Leadership
- Mentor junior engineers, providing guidance and training on technical packages.
- Collaborate with multidisciplinary teams to integrate process design into holistic project solutions, ensuring quality, cost, and timeline compliance.
- Offer input on proposals, budgets, schedules, and work scopes to embedded expertise.
Requirements
Core Experience & Expertise
- Proven track record in process engineering leadership for water infrastructure projects, with primary/secondary/tertiary waste treatment systems experience.
- Expertise in municipal and industrial wastewater, including advanced treatments like MBR, MBBR, and nutrient removal.
- Strong understanding of circular economy principles and ZLD technologies.
- Working knowledge of P&IDs, mass balances, technical specifications, and procurement documentation.
- Hands-on experience with feasibility studies, basic cost estimates, and detailed design delivery.
Behavioral & Communication Skills
- High-calibre technical communicator—able to present Reports/Proposal with clarity and influence stakeholders at all levels.
- Proactive collaboration—facilage multi-disciplinary meetings, bridge gaps between clients, vendors, and project teams.
- Site engagement abilities—fieldwork visits, data collection, and safe interaction with operations.
- Leadership in adapting to consultancy/client environments driven by quality and innovation.


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Desired Qualifications & Training
- Enginingering degree or equivalent cognisation (advacated for senior roles).
- Chartered Engineer (CEng) status advantageous but not essential.
Living at WSP
Work-Life Balance
- Hybrid flexibility: Enjoy 2 days home working paired with modern UK office environments.
- Personal freedom: The "WSP My Hour" policy lets you take time for personal well-being via flexible daily blocks.
Wellbeing
- Access to our virtual GP service, menopause support, and 40% discounted gym membership (Gymflex).
- Reasonable workplace adjustments if applicable.
Inclusion & Growth
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Commitment to diversity, ensuring everyone is welcome.
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Cultivate careers through training, mentorship, or Chartership support.
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Open, equal opportunities for all—gender, race, disability, religion, or background. Disability Confident leader—we’ll accommodate adjustments during interviews.
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