Senior Process Engineer - Water / Wastewater

Job Description

About the Role

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.

Key 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.

Qualifications

Minimum 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.

Desirable Skills / Knowledge

• 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.

• Please note that you must have the right to work in the UK to be considered for this position.

Additional Information

What’s in It for You?

• 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, having been awarded the prestigious Top Employer 2025 certification. Top Employers Institute is the global authority on recognising excellence in people practices.   
• A global leader in green infrastructure - we’re proud to lead the way in sustainable infrastructure, mobility and energy, innovating across the entire value chain and every aspect of the built environment. 
• 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

Ready to Lead?

Join Egis and play a pivotal role in shaping the future of sustainable water infrastructure across the UK.

We are committed to our planet

In each project we design, engineer and operate we care deeply about the legacy we’re leaving behind. As part of our team, you’ll have a unique opportunity to use your skills and expertise to shape a better future for our communities in the UK, and all around the globe.

Our commitment is translated in the work carried out by our Egis Foundation, which funds concrete actions to address the climate crisis and is focused on educational and social initiatives that will help in the responsible and sustainable shift towards a sustainable world.

We are an Equal Opportunities employer and we strive to build a workforce that truly reflects the communities we represent. We welcome candidates from all backgrounds, regardless of age, disability, gender, gender identity, gender expression, race, religion or belief, sexual orientation, socioeconomic background, and any other protected characteristic. If you decide to apply for an opportunity with us, your application will be assessed based purely on your experience, the essential and desirable criteria, and your suitability for the role. We value each and every one’s contribution as this builds our culture and means that if you work with us, you will be included, listened to, and respected.