Principal Engineer/ Lead Process Engineer

• Demonstrable experience in the selection, design, review, commissioning and optimisation of clean water, desalination, wastewater and sludge treatment systems across feasibility, outline design, detailed design and operational improvement stages.

• Demonstrable experience in the selection, design, review, commissioning and optimisation of clean water, desalination, wastewater and sludge treatment systems across feasibility, outline design, detailed design and operational improvement stages.
• Clean-water experience should include source-water quality assessment; coagulation, flocculation, clarification and dissolved air flotation; rapid gravity, pressure and membrane filtration; activated carbon adsorption; ion exchange; advanced oxidation; remineralisation; disinfection; chemical storage and dosing; and management of treatment residuals.
• Desalination experience should cover seawater and brackish-water reverse osmosis, intake and outfall considerations, pre-treatment selection, membrane configuration and recovery, energy-recovery systems, fouling and scaling control, clean-in-place systems, post-treatment and stabilisation, product-water quality, and brine management.
• Wastewater experience should include preliminary and primary treatment, activated sludge, SBR, MBR and attached-growth biological processes, nutrient removal, tertiary filtration, disinfection, effluent reuse, sludge thickening, dewatering and digestion, and odour control.
• The role also requires capability in process calculations, mass and water balances, hydraulic and process modelling, equipment sizing, pilot and treatability studies, process-control philosophy, performance testing, trend and operational-data analysis, root-cause investigation, troubleshooting, capacity assessment, energy and chemical optimisation, and development of practical, safe and whole-life-cost-effective improvement measures.

• Act as Process Lead or Technical Authority on major and technically complex water and wastewater projects, establishing the design basis, process philosophy, key criteria and assurance plan.
• Lead feasibility studies, options appraisal, whole-life-cost evaluation, process selection, pilot/trial planning, risk-based decision making and preferred-option recommendations.
• Prepare, review and approve process calculations and deliverables, including flow and load assessments, mass balances, hydraulic profiles, process flow diagrams, P&IDs, equipment sizing, datasheets, specifications, control philosophies, commissioning strategies and performance-test requirements.
• Undertake plant performance reviews, capacity assessments, process troubleshooting and root-cause analysis; translate operational data into practical improvement measures.
• Lead or support process-safety and design-risk activities including HAZID, HAZOP, SWIFT, DSEAR/ATEX reviews, CDM design-risk management and constructability/operability reviews.
• Develop procurement documentation, evaluate supplier and contractor submissions, undertake technical bid evaluation, manage technical clarifications and confirm compliance with performance requirements.
• Provide construction, commissioning and start-up support, including review of method statements, functional descriptions, operating procedures, sampling plans, performance testing and optimisation.
• Apply and develop digital engineering methods such as automated process-sizing tools, data analytics, process simulation, digital design environments and model-based review.
• Prepare and approve high-quality technical reports, proposals, scope documents, fee estimates and programme inputs across the project lifecycle.
• Maintain effective communication with clients and delivery teams across the UK and other international markets, presenting complex engineering recommendations clearly to technical and non-technical stakeholders.

• Bachelor's degree (B.E./B.Tech or equivalent) in Chemical Engineering, Environmental Engineering or a closely related discipline from a recognised institution.
• Typically, 12–18 years of relevant process engineering experience in the water and wastewater sector, including substantial responsibility for technical leadership, checking/approval and multidisciplinary delivery.
• Proven project experience covering at least two of the three core areas: clean water treatment, desalination/membrane systems and wastewater treatment; broader experience across all three is strongly preferred.
• Experience delivering international projects, preferably for UK, Middle East, Asia-Pacific or North American clients.
• Strong knowledge of process design principles, water chemistry, biological treatment, membrane systems, process control and commissioning.
• Working knowledge of applicable client standards, statutory requirements, British/European or relevant international standards, WIMES, CDM, DSEAR/ATEX and water-industry good practice.
• Demonstrated ability to lead complex technical work independently, make proportionate engineering judgements and communicate decisions with clear evidence and traceability.
• Excellent written and verbal communication, stakeholder management, presentation and technical-reporting skills.