OT Cybersecurity Engineer

Salary: £60,000 - 60,000 per year

Requirements:

• We have experience in cybersecurity with exposure to Operational Technology (OT), ICS, or SCADA utility environments.
• We have working knowledge of core OT security principles, technologies, and processes, including the ISA/IEC 62443 framework.
• We understand firmware and hardware security concepts, including cryptographic signing and hardware security modules (HSMs).
• We are familiar with sector-specific protocols such as DNP3, IEC 60870-5-104, Modbus, and OPC UA.
• We have strong problem-solving, analytical, and organisational skills.
• We hold a relevant degree in Electrical Engineering, Computer Engineering, Computer Science, or have equivalent experience.
• Relevant certifications such as GICSP, ISA/IEC 62443 Specialist, or GRID are desirable.
• We are able to work effectively and responsibly without close supervision while supporting a collaborative team environment.

Responsibilities:

• We support the Threat and Risk Assessment process for client products, solutions, and services.
• We conduct cybersecurity risk assessments for OT components within solutions and services.
• We provide secure design and architecture support for OT projects following Purdue Model principles (Levels 0-3).
• We contribute to security baselines, code-signing processes, and secure boot architecture for OT metering and embedded systems.
• We analyse firmware vulnerabilities using appropriate tools without impacting operational availability.
• We support security testing throughout the project lifecycle, ensuring security factory acceptance tests are undertaken.
• We integrate OT asset visibility and threat detection platforms.
• We maintain compliance with energy sector regulations and frameworks, including ISA/IEC 62443 and NIST SP 800-82.
• We provide procedural and technical cybersecurity advice to project designers, engineers, and testers.
• We monitor and report on cybersecurity target achievements and proactively suggest improvements.

Technologies:

• Embedded
• Firmware
• Hardware
• Support
• Security

More:

We are a leading firm in the cyber security sector seeking an OT Cybersecurity Engineer to join our dynamic team in a permanent role focused on the energy industry. We offer a competitive compensation package, professional development and training, the opportunity to work on a variety of challenging projects, a supportive and inclusive work environment, and a comprehensive employee benefits package. This role is part of our dedicated team working on secure development and implementation of cybersecurity policies, processes, and controls for Operational Technologies (OT).

last updated 39 week of 2026