Senior Associate Process Engineer

Location(s)

Cardiff, London, Croydon, Cambridge, Reading, Brighton, Leeds, Manchester, Edinburgh, Glasgow; UK

Nicola Coyle

Mott Mac Donald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices. We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you’re surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee‑owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued.

Whatever your ambition, Mott Mac Donald is where people come to be brilliant.

The Water Utilities Division is Mott Mac Donald’s centre of excellence for responding to the UK and Ireland's water and wastewater challenges. The work we do is at the forefront of ensuring safe water supplies for future generations, preventing urban flooding, and improving the health of our rivers and coastal environments. Our multi‑disciplinary teams provide a variety of services throughout the full project life cycle, from advisory services and feasibility studies to outline and detailed design.

Together, we deliver best‑in‑class solutions to our clients while offering diverse and technically stimulating opportunities to our people.

We have an exciting opportunity for a Senior Associate Process Engineer to join our team and play a pivotal role in delivering innovative water and wastewater solutions for clients across the UK and Ireland. This senior position offers the chance to lead complex projects, shape technical strategy, and influence the future of water and wastewater treatment.

• Provide strategic leadership and technical direction across feasibility, concept, preliminary, and detailed design stages for water and wastewater treatment projects
• Oversee and approve process designs, including block flow diagrams, P&IDs, mass balances, and equipment sizing, ensuring technical excellence and compliance
• Drive optimisation initiatives by analysing operational data and applying advanced process modelling and simulation techniques
• Author and review high‑quality technical reports, proposals, and presentations for senior stakeholders and clients
• Act as a trusted advisor to clients, building strong relationships and influencing decision‑making
• Champion quality assurance by checking and approving process deliverables
• Mentor and develop technical teams, fostering a culture of innovation and excellence
• Collaborate with resource managers to shape team capability, support recruitment, and lead training initiatives
• Play a key role in business development by guiding proposals, tenders, and strategic pursuits in the water and wastewater sector
• Contribute to setting and challenging technical standards, ensuring adoption of best practice and emerging technologies

• Degree in Chemical Engineering or a related discipline
• Chartered Engineer (CEng) status with a recognised professional institution
• Extensive experience in municipal water and/or wastewater treatment, including leadership of complex projects
• Deep understanding of conventional and emerging treatment technologies
• Proven ability to conduct root‑cause analysis and deliver optimisation strategies
• Strong track record in developing and delivering feasibility, outline, and detailed process designs
• Exceptional technical writing and communication skills, with the ability to engage senior stakeholders
• Demonstrated leadership in reviewing technical deliverables and ensuring compliance
• Strategic mindset with experience in…