OT & Controls Engineer — Water Systems Optimizer

Portsmouth Water; Langstone; On-site; GBP 42,000 - 64,000; Full time

Benefits offered by this job

27 days annual leave

Employee pension scheme (up to 15%)

Performance bonus up to 6%

Private Medical Insurance

Life assurance 4x salary

Wellbeing resources and Employee Assit

Job summary

Portsmouth Water is seeking a proactive OT Engineer to design, develop and optimise OT solutions across Production assets. You will work with Operations and Technical teams to improve site reliability, reduce energy use and strengthen resilience while focusing on water quality, health, safety and wellbeing.

You will lead OT system improvements, support minor OT/ICS projects and mentor colleagues, ensuring safe handover of works and adherence to change control.

Qualifications

• Experience working in OT or industrial IT.
• Experience in PLC/HMI programming and SCADA development.
• Experience working to and from project/engineering documentation.
• HNC/HND Electronic Engineering/Control Systems Engineering.
• Advanced understanding of Industrial Control Systems.
• Experienced in PLC, SCADA and HMI design/modification/integration.
• Advanced understanding of OT communications and networking.
• Ability to successfully obtain UK Government Security Clearance (SC).
• Full UK driving licence.

Responsibilities

• Provide specialist EICA/OT support and technical expertise across water treatment works and associated Network assets.
• Lead the delivery of OT system improvements and optimisations that support efficient, reliable operation of Production assets, including: Implementation of minor OT/ICS projects. Upgrades, enhancements and optimisation of OT assets. Improvements that increase production output, resilience and reliability. Process and control changes or modifications that support continuous improvement.
• Share your knowledge by delivering training, mentoring and technical guidance to colleagues.
• Support Factory and Site Acceptance Testing to ensure solutions are delivered to the right standard.
• Commission OT works where required, ensuring safe and effective handover into operation.
• Maintain robust change control for electronic documents, software packages and PLC/HMI/SCADA/GeoSCADA files.
• Proactively monitor OT cyber security equipment and systems, helping to protect critical operational environments.
• Carry out complex fault finding and diagnosis on Industrial Control Systems, resolving issues that directly support service reliability.
• Provide hands‑on support with reactive and operational work when required.

Skills

OT/Industrial IT

PLC/SCADA

Project docs

ICS engineering

PLC/SCADA/HMI design

OT networking

Security clearance (SC)

Driving licence

Education

HNC/HND Electronic Engineering/Control Systems Engineering

Job description

Portsmouth Water is seeking a proactive OT Engineer to design, develop and optimise OT solutions across Production assets. You will work with Operations and Technical teams to improve site reliability, reduce energy use and strengthen resilience while focusing on water quality, health, safety and wellbeing.

You will lead OT system improvements, support minor OT/ICS projects and mentor colleagues, ensuring safe handover of works and adherence to change control.