Senior Process Engineer - Water Industry

Drive process excellence across national water programmes

Purpose And Scope Of The Role

Tetra Tech is recruiting multiple Senior Process Engineers to lead process design and optimisation for long‑term water and wastewater frameworks across the UK, including a £100m United Utilities single‑award for river health in the North West. You will deliver and review process designs, PFDs, control philosophies, equipment specifications and performance assessments for treatment works and pumping assets. Daily activities include technical leadership of multi‑disciplinary teams, client liaison, digital design methodology application and assurance of compliance with legislative, safety and quality standards on multi‑million pound programmes.

Your Impact In This Position

You will immediately raise the standard of process deliverables and client confidence. Over the medium term you will lead complex design packages, develop low‑carbon and cost‑efficient solutions and support digital tool development for process optimisation.

Core Capabilities

• Process design expertise – Proven ability to produce, verify and approve process calculations, PFDs, control philosophies and equipment specifications for water and wastewater treatment.
• Technical delivery & assurance – Experience delivering technical packages end‑to‑end, ensuring rigorous verification, reporting and knowledge capture to industry standards.
• Innovation & digital methods – Capability to apply and develop digital design techniques, collaborate with laboratories and software teams to implement optimisation tools.
• Multidisciplinary coordination – Skilled at integrating civil, structural, mechanical, electrical and ICA inputs and leading collaborative design and client workshops.
• Stakeholder leadership & commercial awareness – Strong client engagement, commercial understanding and the ability to represent the process team across alliances and supply chains.

Skills, Qualifications And Experience

Expected: degree in Chemical Engineering or related technical discipline. Desirable: postgraduate qualifications and professional membership (IChemE, CIWEM) or working towards chartership.

Work patterns & locations

Hybrid working across UK regional offices with regular site visits; typical office attendance 2–3 days per week. Flexible arrangements considered to support delivery and development.

Why join Tetra Tech?

Tetra Tech is a leading provider of consulting and engineering services working across the full project lifecycle worldwide. We have a wide range of expertise across our teams, providing a global support network with a personalised approach to client relationships to better understand where we can add value. We provide a collaborative environment that supports individual performance, innovation, and creativity. We support public and private sector clients on local, national, and international projects to deliver sustainable and resilient solutions. Our operations in the UK, Ireland, and the Netherlands include more than 6,000 employees who are Leading with Science® to solve our clients’ most complex problems.

In alignment with the Equality Act 2010, we will make reasonable adjustments to support candidates and employees requiring additional arrangements. This could include adaptations to work schedules, training approaches, or the physical workspace. Please inform us if you need any accommodations during the recruitment process or in your day‑to‑day role.

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