Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure.
Why we need this role
This role is critical to protecting both internal telecom infrastructure and customer-facing security services. It ensures the secure deployment and management of technologies across backbone, edge, and cloud environments, while supporting the delivery and integration of managed security solutions for customers. The role plays a key part in incident response, vulnerability management, and maintaining robust security standards. By collaborating across engineering, operations, and product teams, it helps embed security into every layer of the network and service lifecycle, ensuring resilience, compliance, and customer trust.
What you will do
Security Product Engineering (Customer-Facing Focus)
1. Support deployment and integration of customer security products such as managed firewalls, SD-WAN, SASE platforms, and DDoS mitigation solutions.
2. Perform configuration, troubleshooting, and tuning of security services in customer environments.
3. Assist in onboarding, proof-of-concept testing, and support transitions to operations for customer security services.
4. Work with solution architects to operationalize and maintain secure design patterns and templates.
Infrastructure Security (Internal Focus)
5. Deploy and manage security technologies across the telecom backbone, edge, and data centre infrastructure (e.g., firewalls, IDS/IPS, SIEM, PAM, NAC).
6. Collaborate with network and systems teams to secure IP/MPLS transport, SDN platforms, automation tools, and cloud workloads.
7. Monitor and analyse security events and alerts, responding to incidents and escalating as appropriate.
8. Assist with vulnerability assessments, patch management validation, and configuration hardening.
9. Document and maintain infrastructure security standards, configurations, and runbooks.
Support & Collaboration
10. Participate in security incident response, root cause analysis, and remediation efforts.
11. Provide input on threat modelling, security testing, and design reviews for internal and external services.
12. Stay current on security threats, tooling, and telecom-relevant vulnerabilities.
13. Collaborate cross-functionally with engineering, operations, product, and customer support teams.
What we're looking for
Must haves
14. 3–7 years of experience in security engineering and/or network engineering
15. Solid understanding of TCP/IP, routing, firewalls, VPN, and network segmentation principles.
16. Hands-on experience with security tools such as firewalls (Fortinet, Palo Alto, etc.), SIEM/SOAR, IDS/IPS, EDR, or vulnerability scanners.
17. Familiarity with Linux, scripting (Python, Bash), and infrastructure-as-code concepts.
18. Knowledge of secure configuration standards (e.g., CIS benchmarks) and common protocols (e.g., BGP, DNS, SNMP).
Might haves
19. Experience supporting or delivering telecom or ISP infrastructure.
20. Exposure to customer-facing security services or managed security environments.
21. Familiarity with regulatory and industry standards (e.g., NIST, ISO 27001, UK TSA).
22. Certifications such as Security+, GSEC, GCIA, or equivalent are a plus.
23. Telecom or carrier experience strongly preferred
Skills
Cyber Security ArchitectureIT Architecture MethodologiesCyber Security Tools/ProductsCyber Security PlanningSecurity Compliance
Education
A Masters of Bachelors degree such as Computer Science, Information Security or related field
What we offer you:
Looking to make a mark?
At Colt, you’ll make a difference. Because around here, we empower people. We don’t tell you what to do.
Instead, we employ people we trust, who come together across the globe to create intelligent solutions.
Our global teams are full of ambitious, driven people, all working together towards one shared purpose: to put the power of the digital universe in the hands of our customers wherever, whenever and however they want.
We give our people the opportunity to inspire and lead teams, and work on projects that connect people, cities, businesses, and ideas. We want you to help us change the world, for the better.
Diversity and inclusion
24. Inclusion and valuing diversity of thought and experience are at the heart of our culture here at Colt. From day one, you’ll be encouraged to be yourself because we believe that’s what helps our people to thrive. We welcome people with diverse backgrounds and experiences, regardless of their gender identity or expression, sexual orientation, race, religion, disability, neurodiversity, age, marital status, pregnancy status, or place of birth.
Most recently we have:
25. Signed the UN Women Empowerment Principles which guide our Gender Action Plan
26. Trained 60 (and growing) Colties to be Mental Health First Aiders