Senior Principal Process Engineer - Water​/Wastewater

Senior Principal 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.

• Provide senior technical leadership for the process discipline within the UK water/wastewater treatment design team.
• Act as process discipline lead, sub‑lead or senior technical authority on complex treatment projects across design, construction support, commissioning and handover.
• Set and maintain process design standards, checking requirements, modelling approaches, design risk processes, digital workflows and quality expectations.
• Lead and assure complex process deliverables, treatment strategies, process models, key technical decisions, supplier packages, contractor submissions and multidisciplinary interfaces.
• Drive integrated coordination across Process, Mechanical, EICA, civil/structural, architectural, MEP, construction, commissioning and operations teams.
• Lead senior client engagement, technical workshops, optioneering, value engineering, design reviews, process safety reviews and performance optimisation discussions.
• Embed modern delivery approaches including process simulation, data‑led design, automation, standardisation, digital tools and model‑informed decision making.
• Support project directors and project managers with technical risk, scope, resourcing, programme, budget, change control and design quality.
• Build and develop the process sub‑team through recruitment, mentoring, line management, succession planning and professional development.
• Support business planning, work winning, client development, bid strategy and growth of Egis’ UK water/wastewater treatment capability.

• 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 10–12+ years’ relevant process design experience.
• Background must be from water, wastewater and/or biosolids/sludge treatment design.
• Proven track record leading process design and technical assurance on complex multidisciplinary water/wastewater treatment projects.
• Deep technical expertise in treatment process design, process selection, mass balance, process capacity, PFDs, P&IDs, design basis development and commissioning/performance testing.
• Strong practical experience using process modelling/simulation packages such as Bio Win, SUMO, Dynamizu or equivalent.
• Strong understanding of UK regulated water sector drivers, water company standards, CDM 2015, process safety, environmental/regulatory requirements and common delivery models.
• Demonstrable experience developing people, including mentoring, line management, technical coaching, recruitment…