Network Security Engineer SOC

The One Group

Stevenage, United Kingdom

9 days ago

Role details

Contract type

Permanent contract

Employment type

Part-time (≤ 32 hours)

Working hours

Shift work

Languages

English

Compensation

£ 40K

Job location

Stevenage, United Kingdom

Tech stack

User Authentication

Computer Security

DNS

Internet Protocol Security (IP SEC)

Intrusion Detection Systems

Virtual Private Networks (VPN)

OSI Models

Network Security

Nagios

Network Architecture

Network Monitoring

Routing

Packet Analyzer

Paessler Router Traffic Grapher

Security Information and Event Management

TCP/IP

Virtual Local Area Networks

Transport Layer Security

Load Balancing

Purple Team (Cyber Security)

Splunk

Cisco networks

Job description

Network Security Engineer (SOC)Location: StevenageSalary: Circa £50,000 per annumContract: Part-time SC Eligible (British Citizenship Required)Working Pattern: 24/7 shift rota on-site & on-callWe'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

Requirements

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