WSP in the UK & Ireland
Principal / Associate Wastewater Process Engineer
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Principal / Associate Wastewater Process Engineer
Associate Waste Water Process Engineer
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About the Role
An opportunity has arisen for an experienced Associate Waste Water Process Engineer to join our Water Engineering teams in cities including Birmingham, Bristol, Manchester, Liverpool, London, Newcastle or Glasgow.
Working within multidisciplinary project design teams, you’ll play a key role in delivering process engineering design for challenging water engineering projects, including wastewater and water reuse projects nationwide and globally. Your tasks will range from feasibility and optioneering to detailed design for procurement, construction, and reviewing supplier proposals.
As an experienced Waste Water Process Engineer, you’ll collaborate with project teams to deliver high-quality, professional services for diverse and high-profile clients.
Key Responsibilities
- Produce process design deliverables, such as:
- Optioneering studies
- Process calculations & mass balances
- Process flow diagrams (P&IDs)
- Piping and instrumentation drawings & sketches
- Basis of design reports
- Undertake outline or detailed process engineering design
- Conduct site visits for data acquisition and engage with site operators
- Provide technical input to procurement processes
- Support Project Managers in discussions with clients
- Liaise with technology providers and vendors
- Attend HAZOP, HAZID, ENVID, and SWIFT meetings
- Offer technical guidance, coaching, and supervision of junior staff
- Work collaboratively with other engineering disciplines to deliver projects on time, within budget, and to quality standards
- Ensure integration of process engineering design into the broader project scope
- Contribute to proposals, project scopes, schedules, and budgets
- Maintain liaison with clients (internal/external) to ensure their needs are met
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We’re Looking For You To Demonstrate
- Significant experience in:
- Leading process engineering design for infrastructure projects
- Municipal water & wastewater sectors
- Unsupervised preparation or review of technical deliverables (technical specifications, calculations, reports, P&IDs, mass balances, procurement documents)
- Hands-on expertise in wastewater treatment solutions (primary, secondary, tertiary treatments), including:
- Filtration, clarification, chemical dosing, phosphorus removal
- Activated Sludge Process (ASP), Moving Bed Bio Reactor (MBBR), Membrane Bioreactor (MBR), and advanced biological treatments
- Proficiency in circular economy principles and Zero Liquid Discharge (ZLD) processes
- Experience in consultancies or engineering firms as a Process Engineer
- Proven ability to:
- Deliver technically robust reports and presentations (for senior audiences, clients, stakeholders)
- Lead multi-disciplinary meetings (in-person/online)
- Act as a technical representative for external clients
- Willingness to travel to visit operational sites or construction projects
There’s no need to meet all requirements—exceptional skills may compensate.
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About WSP
We are one of the world’s leading engineering and professional services firms, united by a mission to create positive, lasting change. With 11,000+ professionals across the UK and Ireland, we blend local dedication with global know-how.
Your Benefits
Work-Life Balance
- Hybrid working: 2 flexible days at home per week, with modern office collaboration
- Family & personal time for interests and community
Inclusivity & Belonging
- Sherosity of skills, experiences, and backgrounds
- Employee Resource Groups fostering diversity & allyship
- Respectful, supportive culture that celebrates uniqueness
Health & Wellbeing
- Thrive programme for health and wellbeing initiatives
- Virtual GP service (NHS/Ireland) for convenient medical advice
- Menopause support package + reasonable workplace adjustments
- Gymflex: Up to 40% discount on gym memberships
Flexible Time
- WSP My Hour: 1 hour daily for personal time (flexible make-up)
- Part-time/flexible work arrangements
- Optional extra leave + flexible holiday scheduling
Your Development
- Cultivate growth through training, mentoring, and Chartership
- Invest in your career with a supportive, learning-rich environment
Our Commitment to Equality
WSP positively encourages applications from underrepresented groups:
- Sex, race, disability, age, sexual orientation
- Gender reassignment, religion/belief, marital status
- Pregnancy/maternity/paternity leave
As a Disability Confident leader, we interview all disabled applicants meeting core criteria and offer adjustments where needed.
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