Network Security Engineer

83zero Limited; Basingstoke; Hybrid; GBP 55,000 - 65,000; Full time

Job summary

A leading global organization in Basingstoke is seeking a Network Security Engineer. This role involves providing technical support, maintaining network security, and contributing to IT security initiatives in a hybrid working environment. Candidates should have a strong background in network engineering and relevant security certifications. The position offers a competitive salary of up to £60,000 plus a 10% bonus.

Qualifications

• Strong background in network engineering and troubleshooting.
• Operational knowledge of LAN/WAN infrastructure and routing protocols.
• Experience working in secure environments with proactive security posture.

Responsibilities

• Provide technical support and network configuration.
• Maintain Cisco, HP, and Check Point hardware/software.
• Monitor and enhance network security controls.

Skills

Network engineering

Security protocols

Troubleshooting

Firewall configuration

VPN management

Education

Certifications such as CCNA, CCNP, CISSP

Tools

Cisco Secure Access

Check Point

Palo Alto firewalls

Job description

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Location: Basingstoke (Hybrid - 2-3 days on-site per week)

Salary: Up to £60,000 + 10% bonus

83zero are proud to be working with a leading global organisation, headquartered in Basingstoke, who are on the lookout for a Network Security Engineer to join their Central IT division. This business operates within a secure and highly regulated environment and are looking for a technically skilled professional to help maintain and enhance their critical network infrastructure.

As a Network Security Engineer, you'll play a vital role in the build, support, and evolution of complex networking systems, ensuring resilience, security, and performance across their production, pre-production, and development environments. You'll work closely with the Infrastructure and Security teams to both proactively manage the network and support ongoing security initiatives.

Key Responsibilities:

• Provide technical support and network configuration across LAN, WAN, WLAN, VPN, firewalls, and intrusion prevention systems
• Maintain and support Cisco, HP, and Check Point hardware/software
• Respond to service requests and incidents in line with ITIL processes
• Monitor and enhance network security controls including web security gateways, NAC, endpoint security, and perimeter defense
• Contribute to internal reviews, security audits, vulnerability assessments, and penetration testing
• Support firewall rule changes, VPN access, network segmentation, and performance improvements
• Participate in on-call rotation for high-priority issues and assist during major incidents
• Create and maintain documentation including SOPs and security protocols
• Support IT security team with threat modelling, remediation, and policy compliance
• Strong background in network engineering and troubleshooting across complex environments
• Operational knowledge of LAN/WAN infrastructure, routing protocols (OSPF, BGP, EIGRP), VPN (IPSec, IKE, SSL), and firewall configuration
• Experience working in secure environments with a focus on proactive security posture
• Knowledge of network security tools such as Cisco Secure Access, Cisco ISE, Microsoft Defender XDR, Sentinel, and SentinelOne
• Comfortable with vulnerability management frameworks and tools
• Familiarity with network monitoring and performance management
• Previous experience working within an ITIL-based support framework
• Hands-on experience with Check Point, Cisco, or Palo Alto firewalls
• Certifications such as CCNA, CCNP, CISSP, or equivalent
• Experience with Citrix load balancing and Microsoft Azure networking