Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Protect and monitor critical OT environments while implementing security controls.
- Company: Join a leading organisation in critical infrastructure security.
- Benefits: Competitive hourly rate, flexible work schedule, and opportunities for professional growth.
- Other info: Work in a dynamic environment with a focus on continuous improvement.
- Why this job: Make a real difference in securing vital systems that impact everyday life.
- Qualifications: Experience in OT security and knowledge of industry standards required.
The predicted salary is between 104000 - 112000 £ per year.
Location: Culham, Oxfordshire (2 days/week on-site)
Contract: Until 18/12/2026
IR35: In Scope
Rate: £50/hr Umbrella
Clearance: Active SC or lapsed within 12 months
Role Overview
We are seeking an experienced OT Cyber Security Analyst to support the security, monitoring, and continuous improvement of Operational Technology environments within a critical infrastructure setting. This role combines hands-on OT security engineering with governance and risk responsibilities, ensuring OT systems are protected, monitored, and aligned with industry standards and frameworks. You will work closely with OT engineers, security teams, and third-party providers to implement and maintain effective OT security controls.
Key Responsibilities
- Implement OT security controls (segmentation, secure remote access, monitoring tools)
- Integrate OT environments into SIEM/SOC platforms and tune detections
- Support OT asset discovery, inventory, and security assessments
- Identify vulnerabilities and support remediation planning
- Assist with OT incident response (log collection, triage, SOC coordination)
- Work with engineers to ensure secure system changes with minimal disruption
- Track OT security maturity, control coverage, and reporting
- Contribute to OT security policies, standards, and continuous improvement
Essential Requirements
- Experience in oil & gas, rail, chemical, nuclear, or similar critical infrastructure environments
- Strong OT/ICS security background
- Experience implementing OT security controls and strategies
- Knowledge of OT networks, segmentation, and industrial protocols
- SIEM/SOC integration experience in OT environments
- Strong understanding of:
- IEC 62443
- NIST Cybersecurity Framework
- ISO 27001
- UK CAF framework
Desirable
- OT asset discovery / monitoring tooling experience
- Exposure to UK critical infrastructure regulation (e.g. NIS, CAF)
- ITSM and service delivery lifecycle understanding
- Hybrid IT/OT environment experience
Cyber Security Specialist - Network Services employer: GTC Recruitment
Contact Detail:
GTC Recruitment Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Cyber Security Specialist - Network Services
✨Tip Number 1
Network, network, network! Get in touch with folks in the cyber security field, especially those working in OT environments. Attend industry events or webinars to meet potential employers and learn about job openings that might not be advertised.
✨Tip Number 2
Show off your skills! Create a portfolio or a personal website where you can showcase your projects, certifications, and any relevant experience. This gives you an edge and makes it easier for employers to see what you bring to the table.
✨Tip Number 3
Prepare for interviews by brushing up on your knowledge of OT security controls and frameworks like IEC 62443 and NIST. Be ready to discuss how you've implemented security measures in past roles and how you can contribute to their team.
✨Tip Number 4
Don’t forget to apply through our website! We’ve got loads of opportunities, and applying directly can sometimes give you a better chance of landing that interview. Plus, it shows you're genuinely interested in joining us!
We think you need these skills to ace Cyber Security Specialist - Network Services
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience in OT Cyber Security and aligns with the key responsibilities mentioned in the job description. We want to see how your skills fit perfectly with what we're looking for!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about OT security and how your background makes you the ideal candidate. We love seeing genuine enthusiasm!
Showcase Relevant Experience: When detailing your past roles, focus on your experience with OT security controls and frameworks like IEC 62443 or NIST. We want to know how you've tackled challenges similar to those you'll face with us.
Apply Through Our Website: Don't forget to submit your application through our website! It’s the best way for us to receive your details and ensures you’re considered for the role. We can’t wait to hear from you!
How to prepare for a job interview at GTC Recruitment
✨Know Your OT Security Inside Out
Make sure you brush up on your knowledge of Operational Technology (OT) security. Familiarise yourself with key frameworks like IEC 62443 and NIST Cybersecurity Framework, as well as the specific security controls relevant to the role. Being able to discuss these confidently will show that you're not just familiar with the concepts but can apply them in real-world scenarios.
✨Showcase Your Hands-On Experience
Prepare to share specific examples from your past roles where you've implemented OT security controls or conducted risk assessments. Highlight any experience you have with SIEM/SOC integration and how you've contributed to incident response efforts. Real-life stories will make your skills more relatable and memorable.
✨Understand the Industry Context
Since this role is within critical infrastructure, it’s crucial to understand the unique challenges faced in sectors like oil & gas, rail, or nuclear. Research recent incidents or trends in these areas and be ready to discuss how they might impact OT security. This shows that you’re not only technically skilled but also aware of the broader landscape.
✨Communicate Clearly and Effectively
Strong communication skills are essential for this role, especially when working with engineers and third-party providers. Practice explaining complex technical concepts in simple terms. During the interview, ensure you articulate your thoughts clearly and ask questions to demonstrate your engagement and interest in the role.