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Principal​/Associate Wastewater Process Engineer

Job in Liverpool, Merseyside, L1, England, UK
Listing for: WSP in the UK & Ireland
Full Time position
Listed on 2026-09-11
Job specializations:
  • Engineering
    Process Engineer, Environmental Engineer, Water Engineer
Salary/Wage Range or Industry Benchmark: 52000 - 78000 GBP Yearly GBP 52000.00 78000.00 YEAR
Job Description & How to Apply Below
Position: Principal / Associate Wastewater Process Engineer

Job Description

At WSP, you can always find opportunities to grow and do what matters to you. Make the most of our global reach to discover new challenges and chances to work with diverse, talented individuals who will help you expand your horizons.

A Little More About Your Role…

Working within various multidisciplinary project design teams, you will take a key role in the delivery of the process engineering design content on a range of challenging projects in water engineering. These projects include wastewater and water reuse projects throughout the UK and overseas. You will contribute to the project design from feasibility and optioneering through to the production of detailed designs for procurement and construction and review of supplier proposals.

As an experienced Waste Water Process Engineer, you will work within project teams helping us deliver effective and professional services for a range of varied and high‑profile clients.

Key Responsibilities
  • Produce Process Design deliverables such as: optioneering studies; process calculations, mass balance, process flow diagrams, piping and instrumentation drawings, sketches, basis of design reports, etc, to achieve the optimum solution for the project.
  • Undertaking outline or detailed process engineering design.
  • Attending site visits for data acquisition and meeting site operators.
  • Provide technical input to the procurement process.
  • Support Project Managers in technical discussions with our clients.
  • Discussion and liaison with technology providers and vendors.
  • HAZOP, HAZID, ENVID, SWIFT attendance.
  • Provide technical guidance, coaching and technical supervision of junior staff.
  • Work collaboratively with other disciplines on multi‑disciplinary projects delivering work to time, cost and quality expectations and to ensure integration of Process Engineering design requirements into the overall engineering design.
  • Provide input to proposals, work scope, work schedule and budgets.
  • Liaison with the Client (internal or external) ensuring that their needs are met.
We will be looking for you to demonstrate
  • Significant experience in delivering process engineering design aspects of infrastructure projects, including taking the lead process engineering role on a project or significant task.
  • Experience in the municipal water industry.
  • The ability to work mainly unsupervised in the preparation and/or review of process design package deliverables such as technical specifications, calculations, reports, datasheets, schedules, process control philosophies, P&IDs, mass balances and procurement documentation.
  • Experience delivering studies, feasibility, concept designs, FEED and detail design in waste water treatment solutions in the municipal sector or industrial sector such as primary treatments, secondary treatments, tertiary treatments (filtration, clarification, chemical dosing, P removal, ASP, MB , M , and other advanced biological treatments).
  • Understanding of circular economy, Zero Liquid Discharge, emerging tertiary treatments both in municipal and industrial sector.
  • Experience in a consultancy environment or engineering company or other relevant industry acting as Process Engineer.
  • Proven ability to prepare high quality written technical reports and deliver verbal presentations to a high level of quality assurance for a variety of audiences.
  • Confident, articulate communicator with ability to engage in active, professional verbal communications and presentations to colleagues (including senior colleagues), clients and sub‑contractors.
  • Experience leading multi‑disciplinary meetings (online and face to face) and acting as the organisation technical representative with external clients.
  • Be able to travel and visit operational works and construction sites as required, to…
Position Requirements
10+ Years work experience
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