Senior Water & Wastewater Process Engineer

Mott MacDonald; Bodelwyddan; On-site; GBP 60,000 - 76,000; Full time

Job summary

Mott MacDonald Bentley is seeking a Senior Process Engineer in Wales to lead process design for water industry projects through outline and detailed design stages. The role includes providing construction/commissioning support, developing process models, mass balances and control philosophies, and mentoring junior engineers.

You will work within the MMB framework with Dŵr Cymru Welsh Water, delivering non‑infrastructure process design across clean and wastewater facilities, while advancing

Qualifications

• Experience and understanding of water and/or wastewater unit processes and treatment plant, with experience of delivering process design for wastewater projects.
• Chartered or working towards chartership is preferred.
• Experience in leading process design deliverables and technical assurance.

Responsibilities

• Lead development of process design deliverables such as process models, mass balances and control philosophies.
• Provide technical assurance of process designs and ensure compliance with standards.
• Identify opportunities for innovation to meet whole‑life cost and net‑zero drivers.
• Analyse site performance and identify risks impacting project delivery with mitigation.
• Challenge process selection to ensure best value solutions for clients.
• Coach and mentor junior engineers and allocate resources appropriately.
• Present and defend solutions to complex problems and seek input from others.

Skills

Process design

Technical assurance

Mentoring juniors

Client collaboration

Education

Chemical/Process Engineering degree

Tools

HAZOP studies

Process modelling software

Job description

Mott MacDonald Bentley is seeking a Senior Process Engineer in Wales to lead process design for water industry projects through outline and detailed design stages. The role includes providing construction/commissioning support, developing process models, mass balances and control philosophies, and mentoring junior engineers.

You will work within the MMB framework with Dŵr Cymru Welsh Water, delivering non‑infrastructure process design across clean and wastewater facilities, while advancing