IT Security Analyst (3346)
- Salary:Dependent on Experience
- Location:Monument Place
- Contract Type:Permanent
- Closing Date:21 January 2026
At GTR, cybersecurity sits at the core of how we protect our people, platforms, and customers. As an IT Security Analyst, you'll play a hands-on role in strengthening our security posture—supporting daily security operations while helping shape resilient, compliant, and future-ready systems. This is a role for someone who enjoys solving problems, responding to real threats, and continuously improving how security is delivered across the organisation.
What you'll be doing
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Detecting & responding to threats
Monitor security platforms to identify, analyse, and contain suspicious activity, determine root causes, and drive continuous improvement. -
Investigating incidents & hunting threats
Perform in-depth incident analysis and proactive threat hunting to stay ahead of emerging risks. -
Managing vulnerabilities
Conduct vulnerability scans and web application assessments, track remediation, and validate fixes. -
Reducing security risk
Review systems and infrastructure for security gaps and define clear remediation strategies. -
Improving security operations
Onboard log sources into SOC/SIEM tools, validate alerts, and refine detection capabilities. -
Driving best practices & compliance
Support alignment with CIS Benchmarks, ISO27001, and NCSC Cyber Essentials. -
Collaborating across teams
Work closely with IT, engineering, and the wider business to embed security-by-design and share knowledge. -
Maintaining operational excellence
Manage incident tickets, support ITIL-based problem management, and keep security documentation accurate and up to date. -
Automating where possible
Contribute to scripting and automation initiatives to improve efficiency and consistency.
What you'll bring
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Hands-on cybersecurity experience
Proven background in technical security roles, including incident response, monitoring, and risk management. -
Strong analytical & prioritisation skills
Ability to assess risk, triage incidents effectively, and resolve issues in high-pressure situations. -
Clear communication
Confidence explaining technical security concepts to non-technical stakeholders at all levels. -
Framework & standards knowledge
Familiarity with MITRE ATT&CK, NIST/NIS-R, ISO standards, and security best practices. -
Technical breadth
Experience across Microsoft platforms, identity and access management, endpoint protection, and cloud security. -
A security-first mindset
Curiosity about emerging threats, a commitment to continuous learning, and a proactive approach to improving security posture. -
Relevant certifications (desirable)
CySA+, CISSP, Microsoft certifications, ITIL v4, or similar.
Benefits
Pension
Staff Travel
Childcare Vouchers
Extra Holidays
Discount Scheme
Long Service Awards
Employee Assistance Programme
The Transport Benevolent Fund
In-House Occupational Health Department
Cycle to Work Scheme
Testimonials
What our staff say
“I work as part of the Fleet Infrastructure team, which means ensuring our 18 Engineering locations operate safely and efficiently. We oversee all building and track maintenance works as well as various minor and major projects across the network.”
Hannah Richards
Fleet Infrastructure Administrator
“I started in a small ticket office back in 1996 and have continued to work my way up ever since. A previous manager told me about a job he’d seen advertised for a trainer. ’d never considered a job in HR or mentoring before then, but he said I’d be perfect for it and I haven’t looked back since!”
Zoey Hudson
Head of Talent, Diversity and Inclusion
“Since April, I’ve helped to support our Kickstart Scheme. It’s been a really rewarding process to be part of because I know first-hand how tough it can be to find work once you’re out of it.”
Jack Gow
Mobile Station Manager
“I love the freedom that comes with being a train driver. Obviously, there are rules and regulations to follow as well as duties and commitments to carry out, but in a way, you’re sort of your own boss, which is nice.”
Ashley John
Train Driver
“I’m a Thameslink passenger host and team leader based at Luton station and I’m currently doing a Level 3 Supervisor apprenticeship so that I can improve my skills even further. I was hesitant to do the apprenticeship at first because of my age – I left school over 60 years ago without any qualifications! It’s been hard to get back into the routine of learning again.”
Bob Bryce
Passenger Host Team Leader
“It was my brother’s suggestion to join the railway. He was already working in the industry and knew I had some university bills to pay off so told me to give it a go, get out of debt and see what I wanted to do next. After a while, it just felt like actually – this is exactly where I’m meant to be. I’m part of a great team and the on-board department as a whole are brilliant to work with. I feel at home here.”
Tonderai Matizha-Johnson
Area Operations Manager
“When I saw that GTR was advertising places for its apprenticeship scheme I looked into it straight away because I thought it was a great opportunity to learn whilst getting real life experience in a 9-5 job. I applied for a level three business administration apprenticeship and was thrilled to find out I had a place on the course! I was so excited that I didn’t even mind it was based 250 miles away from where I lived.”
Harriet Dee
Team Administrator
“Working for GTR is very rewarding and fulfilling. You really feel like you're making a difference to customers, no matter what role you're in as at the end of the day they're the heart of our business. I’ve had lots of opportunities to explore other aspects of the business including supporting our station staff and gaining my Train Dispatch Licence which has been enriching for my experience here.”
Maggie Luckhurst
Platform / Train Dispatch
“If you’ve always had an interest in rail, or maybe you’re just curious to find out what working in the railway might look like, GTR is the operator to go for. Not many companies do an official work experience program and this unique opportunity will give you a good grounding with varied activities to help you find the best place in the railway for you. It certainly did it for me.”
Nathaniel Owen
Station Manager