Senior Process Engineer in Cardiff

Mott MacDonald 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 MacDonald is where people come to be brilliant.

The Water Utilities Division is Mott MacDonald’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.

Come join our dynamic and award‑winning OneWater Team at Mott MacDonald, where we are committed to our Clients, our People and the Environment. Our process engineering team works as part of our fully integrated multi‑disciplinary service offering. Together, we deliver client‑centric solutions across a diverse portfolio of water sector projects and frameworks. Building on our proud 70‑year long track record in Ireland, we have secured numerous exciting framework appointments up to 2030 and beyond. This success is allowing us to grow our pool of talented Process Engineers.

We are agile across our resource teams which offers candidates excellent career progression opportunities. We are widely seen as the core of our global water and wastewater delivery capability, providing support to colleagues across our global business. You will work alongside industry recognised experts to deliver value to key utility company clients, such as Uisce Éireann, NI Water, Scottish Water and other AMP water companies. You'll undertake process investigation and design across all stages of water and wastewater scheme development; from high level master planning through to detailed design and commissioning.

Your typical duties and responsibilities will include preparation of studies and reports, process calculations and drawings to support other disciplines in the preparation of their deliverables. You will also be involved with business development including providing specialist support to our.