Senior Process Engineer - Water Sector

The Opportunity

The UK water sector is facing increasing pressure to deliver resilient infrastructure, improve treatment performance and respond to changing environmental and customer needs. At Stantec, our Process Engineering teams are helping clients tackle these challenges by developing practical, sustainable solutions across the water cycle.

The Opportunity

The UK water sector is facing increasing pressure to deliver resilient infrastructure, improve treatment performance and respond to changing environmental and customer needs. At Stantec, our Process Engineering teams are helping clients tackle these challenges by developing practical, sustainable solutions across the water cycle.

We’re looking for a Senior Process Engineer to join our growing teams in London, High Wycombe, Reading, Brighton, Southampton or Cambridge. You’ll work alongside experienced engineers and specialists across a varied portfolio of UK water projects, with opportunities to build your technical expertise and take greater ownership of project delivery.

Whether your experience is in clean water, wastewater or both, this is an opportunity to work on technically interesting projects, contribute to client solutions and continue developing your career within a supportive and collaborative team.

About The Role

As a Senior Process Engineer, you’ll take responsibility for key areas of process engineering delivery across a range of water and wastewater projects. You’ll combine your technical knowledge with practical project experience, working closely with multidisciplinary teams to develop effective engineering solutions.

You Will

• Develop process engineering solutions across water and wastewater treatment projects.
• Undertake process calculations, mass balances, hydraulic assessments and treatment process evaluations.
• Develop and review technical reports, specifications, calculations and other project deliverables.
• Take ownership of technical work packages, managing inputs, quality and delivery to agreed timescales.
• Support process design development from concept through to detailed design and construction support.
• Contribute to site investigations, asset assessments, optimisation studies and technical workshops.
• Work closely with civil, mechanical, electrical, hydraulic and environmental engineers to develop integrated solutions.
• Engage with clients and project teams to understand requirements and translate challenges into practical engineering solutions.
• Support and mentor less experienced engineers, sharing knowledge and contributing to the wider development of the team.
• Contribute to technical innovation, best practice and continuous improvement across our Process Engineering work.

YOUR IMPACT

The work you deliver will help water companies improve the performance, resilience and sustainability of essential water infrastructure across the UK. From improving treatment processes and optimising existing assets to supporting the development of new infrastructure, your technical contribution will help address some of the sector’s most important challenges.

As a Senior Engineer, you’ll also have the opportunity to broaden your project and client experience, develop your leadership skills and take increasing ownership of technically challenging work. You’ll be supported to build the experience needed for your next career step, whether that’s towards technical specialism, project leadership or professional registration.

ABOUT YOU Essential

• Degree qualified in Chemical or Process Engineering or a related discipline.
• Experience in process engineering within the water, wastewater, utilities or related sectors.
• Practical experience in process design, calculations, mass balances, hydraulic assessments and/or treatment process evaluation.
• Good understanding of water and/or wastewater treatment processes and engineering principles.
• Experience taking ownership of technical tasks or work packages within multidisciplinary projects.
• Strong analytical and problem‑solving skills, with the ability to develop practical engineering solutions.
• Good written and verbal communication skills, with the confidence to work with colleagues, clients and other project stakeholders.
• Ability to manage your own workload and contribute effectively within a multidisciplinary team.

Desirable

• Chartered or Incorporated Engineer (CEng/IEng) or actively working towards
• Membership of a relevant professional institution such as CIWEM, IChemE, ICE or IMechE.
• Experience working with UK water companies and AMP investment programmes.
• Experience across clean water or wastewater treatment, asset optimisation, process performance or infrastructure design.
• Experience supporting site investigations, commissioning, testing or process optimisation activities.
• Experience using digital tools and innovative approaches to improve process engineering delivery.
• Experience supporting bids, frameworks, client relationships or business development activities.
• Experience mentoring or supporting the development of less experienced engineers.

WHY JOIN US

• We put people first: We're proud of our friendly, inclusive and collaborative environment where everyone feels valued and driven to succeed.
• We are driven to achieve: Named in the top 50 companies to work by Glassdoor 2025. Recognised by Corporate Knights as one of the world's top 10 most sustainable companies 2025. Named ‘Best Place to Work’ and ‘International Consulting Firm of the Year’ at the NCE Awards 2024.
• We do what is right: Industry leading training and development as well as paid for professional subscriptions. A professional progression plan, supporting you to become chartered with ICE.
• We are better together: A supportive and collaborative team environment and Early Careers peer group and wider ERG network (see more on our ERGs here: Stantec Employee Resource Groups).
• Growth: We're on an exciting growth journey across the UK - we want you to be part of it!
• Great Benefits: Competitive salary, bonus schemes, enhanced pension plan, annual leave with the option to buy/sell additional days, private medical insurance, group income protection & life assurance included as standard as well as discounted gym membership and lots more.
• Hybrid / Flexible working: Enjoy a healthy work-life balance with our hybrid approach to flexible working.

About Stantec

The Stantec community unites more than 34,000 employees working in over 450 locations across 6 continents. We have been working with our clients and communities in the UK for over 150 years. We plan, design, deliver and manage the development and infrastructure needed to support the creation of sustainable, healthy and prosperous communities.

Our teams provide effective and relevant solutions, translating our clients’ vision into valued consents, deliverable plans for projects and programmes, and efficient designs for delivery, based on technical excellence and deep market insights. We deal with today’s challenges, but also keep a fairer, better tomorrow in sight, looking at how we deliver clean growth, support radical changes in our economy and meet the needs of future communities.

Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment.

Building an inspired, inclusive work environment that attracts, supports, and develops world-class talent is a crucial key to our success. If you are excited by this role but worry that your experience doesn’t exactly align, we encourage you to apply.

At Stantec we want you to perform your best at every stage of the recruitment process and are committed to ensuring it is accessible to all. If you need any support or require adjustments to be made then please contact [email protected] and we will talk to you about how we can support you.