Principal Process Engineer - Water / Wastewater
HybridManchester, England, United Kingdom
Job Summary
Lead process design delivery on multidisciplinary water/wastewater treatment projects across the full design lifecycle, acting as technical lead on strategy, treatment process selection, and key decision-making. Review and approve process calculations, mass balances, PFDs, P&IDs, and basis of design reports while driving optioneering, capacity assessments, and HAZOP/SWIFT studies. Coordinate with Mechanical, civil, and operations teams to promote lean, digitally enabled delivery through automation and reusable templates. Provide technical assurance on project risks and scope, mentor engineers on development and chartership progression, and contribute to bids and client engagement. Requires BEng/MEng in chemical or process engineering, chartered status, and 8–10+ years of UK water sector experience. Based in London, Bristol, or Manchester (Hybrid).
Required Qualifications
- BEng/MEng or equivalent in Chemical Engineering, Process Engineering or closely related discipline
- Chartered Engineer or Incorporated Engineer status with a relevant professional institution, such as IChemE
- Typically 8–10+ years' relevant process design experience
- Background must be from water, wastewater and/or biosolids/sludge treatment design
- Proven ability to act as process discipline lead or senior technical lead on multidisciplinary projects
- Strong technical expertise in water/wastewater treatment process design, including process selection, mass balance, process capacity, PFDs, P&IDs and design basis development
- Practical experience using process modelling/simulation packages such as BioWin, SUMO, Dynamizu or equivalent
- Strong understanding of UK water industry standards, CDM 2015, process safety, safety-by-design, regulatory drivers and common delivery models
- Confident client-facing communicator with experience leading workshops, technical reviews and design discussions
- Experience mentoring or managing engineers and supporting technical capability development
- Must have the right to work in the UK
Desired Qualifications
- Deep experience in wastewater treatment, clean water treatment, sludge/bioresources, nutrient removal, water reuse/recycling, process optimisation, chemical dosing, energy recovery or low-carbon design
- Experience delivering AMP8, WINEP, SRO, D&B, framework, alliance or contractor-led projects
- Advanced capability in BioWin, SUMO, Dynamizu, process model calibration, scenario testing, dynamic simulation or operational optimisation
- Experience developing process design standards, calculation tools, modelling workflows, QA processes or reusable digital templates
- Experience contributing to recruitment, resource planning, bid writing, technical proposals, client presentations or new service development
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