Senior Process Engineer - Water / Wastewater

The UK water sector is entering a period of unprecedented investment and transformation. As Egis accelerates the growth of its Water Business in the UK, we are building a high-performing Process Engineering team to help shape this next chapter. We are inviting applicants who want to play a meaningful role in delivering major water and wastewater programmes in the UK municipal and industrial sectors. Working within a collaborative, multidisciplinary environment, you will contribute to technically robust, sustainable and innovative treatment solutions across nationally significant projects. This is a rare opportunity to join at a key stage of our UK growth journey, helping to establish, shape and expand a process engineering capability built on Egis’ global infrastructure expertise and long-term commitment to the sector.

Responsibilities

Lead defined process design tasks or work packages across feasibility, optioneering, concept, outline and detailed design; Prepare, check and coordinate process deliverables including calculations, mass balances, PFDs, P&IDs, basis of design reports, specifications, datasheets and schedules; Take ownership of assigned process packages, managing technical quality, interfaces, scope, budget, programme and change; Lead site surveys, data reviews, process capacity assessments and technical discussions with clients, operators, suppliers and contractors; Develop treatment process options and support selection of efficient, robust and operable solutions; Coordinate process interfaces with Mechanical, EICA, civil/structural, architectural, MEP and construction teams; Support HAZOP, SWIFT, DSEAR, HAC/HAP, CDM/safety-by-design reviews, commissioning strategies and performance testing; Apply process modelling, simulation, spreadsheets and data analysis to improve design quality and support evidence-based decisions; Review supplier/contractor submissions, respond to technical queries and support construction, commissioning and handover where required; Mentor Engineers and Graduates and contribute to process standards, templates and delivery improvements

Requirements

BEng/MEng or equivalent in Chemical Engineering, Process Engineering or closely related discipline; Chartered Engineer status, or significant CEng-level experience while actively progressing towards chartership; Typically 6+ years’ relevant process design experience; Background must be from water, wastewater and/or biosolids/sludge treatment design; Proven ability to deliver process design packages within multidisciplinary projects; Strong practical experience preparing and checking process calculations, mass balances, PFDs, P&IDs, basis of design reports, specifications and technical documentation; Working knowledge of UK water industry standards, CDM 2015, process safety, safety-by-design and relevant regulatory requirements; Experience using process modelling/simulation, advanced spreadsheets or data-led design methods to support treatment design; Good commercial awareness and ability to deliver to agreed scope, budget and programme; Strong communication skills, including ability to lead technical discussions and present recommendations clearly; Right to work in the UK

Nice to have

Practical experience using BioWin, SUMO, Dynamizu or similar water/wastewater process simulation packages; Experience with AMP8, WINEP, SROs, D&B, framework, alliance or major capital delivery environments; Experience in nutrient removal, sludge/bioresources, water reuse, process optimisation, chemical dosing, energy recovery, advanced treatment or low-carbon design; Experience supporting commissioning, performance testing, HAZOPs, SWIFT reviews or technical assurance reviews; Experience mentoring junior staff and improving process workflows, templates or technical standards

Benefits

An exciting new growth role in a fast-organic growing UK business, offering clear and accelerated career progression; Top Employers 2025 - Egis recognised across four continents for excellence in HR practices; A global leader in green infrastructure; Highly competitive reward package; Hybrid and flexible working; 26+ days annual leave plus bank holidays; Professional development, chartership support & global mobility; Supportive, inclusive culture driven by sustainability and long-term community impact