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Working Pattern: 24/7 shift rota on-site & on-call
We’re looking for a Network Security Engineer to join a high-performance security operations environment, protecting critical infrastructure and ensuring the resilience of complex enterprise networks. You’ll work within a 24/7 Incident Response function, combining hands‑on engineering with real‑time threat detection, investigation, and remediation.
Key Responsibilities:
- Monitor, investigate and triage security events within a 24/7 SOC environment
- Configure, maintain and troubleshoot enterprise firewalls (Cisco, Palo Alto, Checkpoint)
- Manage secure proxy platforms such as Bluecoat or F5, including content filtering and SSL inspection
- Lead deep-dive analysis using packet capture to identify malicious traffic and attacker behaviours
- Implement secure changes across network architecture, ensuring compliance and best practices
- Support continuous improvement through the optimisation of network security tools, including “purple team” feedback and hardening recommendations
- Contribute to the standardisation of network security tooling and documentation
- Collaborate with infrastructure, security and architecture teams to deliver robust, resilient network solutions
About You:
- Strong understanding of core networking: TCP/IP, DNS, routing, switching, VLANs, load balancing
- Hands‑on experience with next‑generation firewall technologies and advanced features (IPS/IDS, SSL decryption, DPI)
- In‑depth knowledge of IPSec, SSL/TLS, VPNs and authentication mechanisms
- Experience with network monitoring tools (PRTG, Nagios or similar)
- Ability to analyse complex traffic flows and identify threat patterns such as exploitation, C2, lateral movement, or exfiltration
- Understanding of secure network architectures (DMZs, segmentation, internal zones)
- Exposure to SIEM platforms (Splunk, LogRhythm, Darktrace) is beneficial
- Experience interpreting OSI model behaviours and protocol‑level diagnostics is advantageous
- SC eligible with British citizenship
- Company bonus scheme
- Pension contributions up to 14%
- Paid overtime opportunities
- Flexi‑leave (up to 15 additional days)
- Enhanced parental leave
- Subsidised meals, free parking and excellent on‑site facilities
Seniority level
Employment type
Job function
- Information Technology, Production, and Analyst
Industries
- Aviation and Aerospace Component Manufacturing
- Defense and Space Manufacturing
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