OT Maintenance Technician

Job Title: OT Maintenance Technician
Work Type: Contract (6 month)
Location: Exeter (Hybrid)

Role Overview
We are seeking a skilled and adaptable OT Maintenance Technician to support the maintenance and reliability of operational technology systems. The role involves maintaining, calibrating, and optimising regulatory monitoring equipment, instrumentation, and process control systems across operational environments.
The successful candidate will play a key role in delivering both planned and reactive maintenance, ensuring compliance with regulatory standards, and supporting the continuous improvement of asset performance. This position requires strong technical expertise, a proactive approach to problem-solving, and the ability to work collaboratively across multidisciplinary teams.

Key Responsibilities

• Carry out planned preventative and proactive maintenance on instrumentation, telemetry, and regulatory equipment to ensure system reliability and compliance


• Provide timely response to operational issues, conducting on-site diagnosis, fault finding, and resolution


• Perform calibration and maintenance of process sensors, analytical instruments, and control systems


• Support the delivery of cost-effective improvements to regulatory assets and associated systems


• Ensure adherence to established standards, policies, and change governance procedures


• Collaborate with cross-functional teams including OT Engineers, ICA, mechanical and electrical technicians to prioritise and deliver maintenance activities


• Apply electrical, instrumentation, and process system knowledge to optimise performance and minimise system risks


• Conduct or support root cause analysis (RCA) of equipment failures and take ownership of corrective actions


• Engage with OT leadership and engineering teams to contribute to technical standards development and compliance (e.g., UK NIS Regulations)


• Assist in developing and expanding IT/OT governance frameworks related to regulatory equipment and assets


• Support the preparation and maintenance of technical documentation, procedures, and training materials


• Collaborate on risk assessments, safe systems of work (SSOW), and task safety instructions


• Promote and maintain a strong health & safety culture, ensuring compliance with company policies and legislation


• Maintain awareness and compliance with information security policies and standards


• Participate in ongoing training and development to enhance technical knowledge and meet regulatory requirements

• Strong knowledge of instrumentation, sensors, and process control systems


• Experience with SCADA, PLCs, telemetry systems, and industrial automation


• Proficient in fault diagnosis, troubleshooting, and root cause analysis


• Understanding of preventative and reactive maintenance practices


• Knowledge of health & safety regulations and risk management


• Familiarity with change management and compliance frameworks


• Excellent problem-solving and analytical skills


• Strong communication and teamwork abilities


• Ability to prioritise tasks and adapt to changing operational demands

• 3–5 years’ experience in Operational Technology, Instrumentation, or Maintenance roles


• Background in utilities, manufacturing, energy, or process industries preferred


• Relevant technical qualification (e.g., Electrical, Instrumentation, Control Engineering)


• Experience with regulatory or critical infrastructure environments is desirable

• Knowledge of UK NIS (Network and Information Systems) Regulations


• Experience with industrial cybersecurity practices


• Exposure to asset performance optimisation and continuous improvement initiatives

• A resilient and adaptable professional who thrives in fast-paced environments


• A proactive problem solver with a strong sense of ownership


• A team player who can collaborate effectively across departments


• Commitment to safety, compliance, and quality outcome

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