OT Maintenance Technician South West Water · Digital and Technology · Plymouth

Pennon Group; Plymouth; On-site; GBP 40,000 - GBP 60,000; Full time

Job description

Powered by Water, Driven by Purpose

South West Water keeps the South West flowing with safe, reliable drinking water and wastewater services across some of the UK’s most stunning landscapes.

We’re proud to be part of Pennon Group, a leader in the UK water sector, working towards a greener future. Our goals? As well as lowering our carbon footprint, we’re working with partners to plant 300,000 trees, restore peatlands and supporting farmers and landowners to improve water quality and wildlife.

Whether you’re starting out or seeking a new challenge, our scale and ambition create opportunities for you to shape your own career.

Ready to make a splash? Join our team today.

Great new opportunity for an Operational Technology Maintenance Technician to join our team at Crownhill Depot, Plymouth. Starting salary £35,828 plus benefits. This role offers the chance to build your technical qualifications and progress within a supportive operational team.

The Role

As an OT Maintenance Technician, you’ll maintain and calibrate regulatory monitoring equipment, analytical instrumentation and process sensors across our operations. You’ll complete planned maintenance and respond quickly to operational issues, carrying out onsite analysis, diagnosis and problem resolution while ensuring compliance with established standards and change processes.

You’ll need to be resilient and adaptable, able to manage changing priorities with a positive, flexible approach. The technology you’ll work with is varied and interesting, including sensors, instrumentation, process control and telemetry.

What you’ll be doing

• Carry out planned and reactive maintenance on instrumentation, telemetry and regulatory equipment.
• Diagnose and resolve operational issues quickly to maintain performance and compliance.
• Support cost‑effective improvements and ensure adherence to standards and change processes.
• Work collaboratively with OT, ICA, mechanical and electrical teams to prioritise and deliver work.
• Use electrical/control/process knowledge to optimise systems and reduce operational risk.
• Assist with root‑cause investigations and drive effective resolutions.
• Contribute to compliance with legislation (e.g., UK NIS) and support technical standards.
• Promote strong health & safety practices and support risk assessments and safe working procedures.
• Maintain skills through required training and support IT/OT governance and documentation updates.

What we’re looking for

• GCSEs (Maths, English, Science) or equivalent, plus relevant industrial control apprenticeship/qualifications and ONC/HNC in a related discipline.
• Experience with process control, ELV/LV electrical systems and PLCs (ideally Schneider), including programming and communication protocols.
• Strong fault‑finding and repair skills, with knowledge of instrumentation calibration, process sensors, telemetry and low‑power radio systems.
• ATEX/CompEx certified and compliant with current IEE regulations.
• Experience in drinking and waste water treatment automation processes.
• Excellent IT, communication and organisational skills, with the ability to work independently and manage changing priorities.
• Proactive, innovative and safety‑focused, promoting wellbeing and safe working practices.
• Understands information security policies, builds strong stakeholder relationships, and maintains up‑to‑date technical and business knowledge.
• Full UK drivers licence and able to travel around the work area using company vehicle
• Ability to complete UK Government Security Clearance (SC) process successfully

What's in it for you

• Generous holiday allowance plus bank holidays
• A discretionary Bonus
• Competitive Contributory Pension
• Share-save Scheme
• Various health benefits
• Wellbeing support programmes
• A range of Group Discounts
• Cycle to Work Scheme

Closing Date: 19th February 2026

Please note that the successful candidate will be subject to a mandatory DBS check as part of the onboarding process.

Be yourself, we like it that way. Together, we will build a culture of belonging, where inclusion is instinctive. Diversity is our strength and a reflection of our communities. We care, we value everyone, we celebrate uniqueness.

Our core values which are essential to our success are:

Be Rock Solid - Build trust and be trusted. Be the one we all look to and can depend on.

Be You - We want you to bring your best everyday. Be yourself and make your mark in your individual way.

Be the Future - Embrace change. Drive Progress. Own the challenge.