Principal 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.

• Lead process design delivery on multidisciplinary water/wastewater treatment projects across the full design lifecycle.
• Act as process technical lead on projects, owning design strategy, treatment process selection, key decisions, interfaces, risks and quality of deliverables.
• Review and approve process calculations, mass balances, PFDs, P&IDs, basis of design reports, specifications, technical notes, models and supplier/contractor submissions.
• Lead process modelling and simulation activities using tools such as Bio Win, SUMO, Dynamizu or equivalent packages.
• Lead optioneering, process capacity assessments, value engineering, design reviews, HAZOP/SWIFT, commissioning strategy and performance testing input.
• Drive multidisciplinary coordination across Mechanical, EICA, civil/structural, architectural, MEP, construction, commissioning and operations teams.
• Promote lean and digitally enabled delivery through standardised tools, process models, automation, data analysis and reusable templates.
• Provide technical assurance and support project managers with technical risk, scope, resourcing, programme and change control.
• Mentor and manage engineers where appropriate, supporting recruitment, development and chartership progression.
• Contribute to bids, client engagement, opportunity shaping and growth of the process 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 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 Bio Win, 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.

• 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 Bio Win, SUMO, Dynamizu, process model calibration, scenario testing,…