OT​/ Controls Engineer

We’re making a difference:
Together, we can ensure that there is enough water for everyone, now and in the future.

We are looking for a proactive and solutions-focused Operational Technology (OT) Engineer to join our highly regarded Production Department. This is an exciting opportunity to play a key role in designing, developing and optimising OT solutions across our Production assets, helping us deliver reliable, safe and efficient water services to our customers. Working closely with Operations and Technical teams, you will use your expertise to improve site reliability, reduce energy consumption, strengthen operational resilience, and support our continued focus on water quality, health, safety and wellbeing.

• 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.

• 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

If you are successful for the role, you will be required to undergo Baseline Personnel Security Standard (BPSS) pre-employment checks that will include a basic disclosure check. Depending on the role, you may also be required to go through the national security vetting process for either a CTC or SC clearance check. Any offer of employment is conditional upon completion and receipt of satisfactory checks.

We recognise people want to work in a variety of different ways, and that’s why we’re happy to consider flexible working arrangements. Please feel free to talk to us at interview about the flexibility you may be looking for.

Please note, we may close this advert early if we receive a high volume of applications — so we encourage you to apply as soon as possible to avoid missing out.

We’re committed to equality, diversity and inclusion, and we actively encourage applications from all sections of society.

Please be aware, the Company has a responsibility to ensure that all employees are eligible to live and work in the UK.

Due to the high volume of applications we may receive, we’re unable to respond to every applicant individually. If your application is of interest, we’ll usually be in touch within 4 weeks of receiving it.

At Portsmouth Water, we believe in rewarding our people. Here’s just a taste of what’s waiting for you when you join the team:

Enjoy 27 days of annual leave, plus bank holidays, giving you plenty of time to relax, recharge and explore.

We’ll help secure your future with a generous pension scheme, contributing up to 15% –…