Control, Instrumentation & OT Technician

At Holford Gas Storage, you’ll join a highly skilled engineering team at a modern, highly automated UK critical-infrastructure site. This hands‑on role brings together control and instrumentation engineering, industrial automation and operational technology cyber security—helping to keep an important part of the UK energy portfolio reliable and secure.

Support the Lead C&I Engineer in delivering the site’s Control and Instrumentation Maintenance and Engineering Strategy.

Support the OT Security Engineer with the technical delivery of OT maintenance for cyber-security risk mitigation.

Investigate and resolve emerging issues affecting field instruments and control equipment.

Carry out approved routine OT cyber-security maintenance, including patching support, antivirus updates, application‑control support, and maintenance of OT asset inventories, network diagrams and records.

Prepare maintenance orders for on‑site work and deliver defined packages of work within your areas of competence.

Support the operation and upkeep of OT security controls and infrastructure, including corrective actions arising from assessments, audits or engineering decisions.

Provide technical assistance during OT cyber incidents, OT‑related incidents and fault investigations through information gathering, directed checks and corrective action.

A technical apprenticeship with a Level 3 qualification, or equivalent qualifications and experience, in cyber security, control engineering or automation engineering.

Proven maintenance experience in control and instrumentation or industrial automation.

Practical understanding of sensors, actuators and signal‑conditioning equipment.

Working knowledge of Distributed Control Systems, process‑control concepts and philosophies, and OT security principles.

Basic awareness of common OT cyber‑security controls—such as network segmentation, access control, patching and logging—and how they are applied in industrial environments.

The ability to read and interpret engineering drawings and documentation, including P&IDs, panel schematics, logic diagrams, loop drawings, and cause‑and‑effect charts.

The ability to read and interpret PLC logic in various languages.

A basic understanding of cyber‑security principles and standards, such as IEC 62443 and the ISO 2700x family, with an appetite to develop further.

Experience troubleshooting DCS or PLC systems—ideally ABB 800xA.

Understanding of functional safety and DSEAR topics.

An understanding of the health, safety and environmental aspects of managing external service‑provider activities.

Comp Ex Modules 1–4 and/or a functional‑safety qualification.

You’ll be part of a supportive, international organisation that is transforming the world of energy while helping to safeguard security of supply. The organisation promotes equal opportunities, mutual appreciation and respect, with development opportunities designed to help you realise your potential.

Competitive salary of £53,000–£65,000.

Enhanced company pension, with company contributions of up to 12%.

26 days’ annual leave plus bank holidays.

Company‑funded private medical insurance, including a free GP service.

In‑house occupational health services.

Performance‑related benefits.

Personal development, training and learning opportunities.

Access to flexible benefits, including a Share Incentive Plan, dental cover, critical‑illness and life insurance, Cycle2

Work, and the option to buy or sell holiday.

Future career opportunities in the UK and internationally, supported by a strong focus on diversity, equity and inclusion.

Electric‑vehicle charging at company sites.

The organisation is proactively transforming the world of energy while ensuring security of energy supply. Its diverse, international teams develop new business models and technological solutions for a modern, sustainable and future‑oriented energy system. Colleagues are encouraged to help shape change, contribute ideas and build careers across a business spanning more than 80 countries.