Location
Manchester (Hybrid) with opportunities to work across London, Bristol and UK-wide projects.

Hours
Full Time

Salary
Negotiable

About the Role
The UK water sector is entering a period of unprecedented investment and transformation. Egis is rapidly expanding its Water Business in the UK and is building a high-performing Process Engineering team to help shape this next chapter. As a Principal Process Engineer, you will lead process design delivery on multidisciplinary water and wastewater treatment projects across the full design lifecycle. You will act as the process technical lead, owning design strategy, treatment process selection, key decisions, interfaces, risks and quality of deliverables. Working within a collaborative, multidisciplinary environment, you will contribute to technically robust, sustainable and innovative treatment solutions across nationally significant projects. This role offers a rare opportunity to join at a key stage of Egis’ UK growth journey, helping to establish, shape and expand process engineering capability built on global infrastructure expertise and a long-term commitment to the sector.

Key Responsibilities
- Lead process design delivery on water/wastewater treatment projects
- Act as process technical lead, owning design strategy and quality
- 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 using BioWin, SUMO, Dynamizu or equivalent
- Lead optioneering, 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 risk, scope, resourcing, programme and change control
- Mentor and manage engineers, supporting recruitment, development and chartership progression
- Contribute to bids, client engagement, opportunity shaping and growth of the process capability

About Egis
Egis is a global leader in sustainable infrastructure, with over 25,500 experts across 70+ countries. We design and deliver intelligent infrastructure to address climate challenges and strengthen community resilience. Recognised as a Top Employer 2025, we offer a supportive, inclusive culture driven by sustainability and long-term community impact. Join us to play a pivotal role in shaping the future of sustainable water infrastructure across the UK.

Experience
- Typically 8–10+ years’ relevant process design experience in 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 BioWin, 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

About you
- Motivated to work in a fast-growing, high-impact environment
- Collaborative and able to drive multidisciplinary coordination
- Committed to sustainability and delivering innovative, robust solutions
- Strong leadership skills with ability to mentor and develop others
- Excellent communication and stakeholder engagement skills

Qualifications
- 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
- Right to work in the UK is essential

Desirable Skills / Knowledge
- 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 BioWin, SUMO, Dynamizu, process model calibration, scenario testing, dynamic simulation or operational optimisation
- Experience developing process design standards, calculation tools, modelling workflows, QA processes or reusable digital templates
- Experience contributing to recruitment, resource planning, bid writing, technical proposals, client presentations or new service development