Senior Process Engineer - Water​/Wastewater

About Us

Senior Process Engineer – UK Water/Wastewater

Water | Wastewater | Biosolids/Sludge | AMP 8 | SROs | MEP-Led Team

Shape the Future of Water Infrastructure with Egis

• London | Bristol | Manchester (Hybrid)
• Process Engineering Design | UK-Wide Impact | High-Growth Environment

Egis is expanding rapidly in the UK, backed by a global team of more than 23,500 experts across 70+ countries. We design and deliver intelligent, sustainable infrastructure to address climate challenges and strengthen community resilience. As part of our fast-growing UK Water team, you will join an agile environment where progression is quick, visibility is high, and your impact is immediate.

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.

• 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.

• 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.

• Practical experience using Bio Win, 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,…