Senior 24/7 On‑Site Network Security Engineer

The ONE Group Ltd; Stevenage; On-site; GBP 42,000 - 64,000; Part time

Benefits offered by this job

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

Excellent on-site facilities

Job summary

A leading security firm in Stevenage seeks a Network Security Engineer to protect critical infrastructure in a 24/7 Incident Response role. The ideal candidate will have experience with enterprise firewalls and network monitoring tools, alongside a strong understanding of TCP/IP and advanced firewall technologies. This role offers competitive compensation, pension contributions, and additional perks.

Qualifications

• Strong understanding of core networking principles.
• Hands-on experience with advanced firewall features.
• In-depth knowledge of cryptographic technologies.
• Experience with traffic analysis and threat detection.
• Understanding of secure network architectures.
• SC eligibility required with British citizenship.

Responsibilities

• Monitor and triage security events in a 24/7 SOC.
• Configure and maintain enterprise-level firewalls.
• Lead analysis to identify malicious network traffic.
• Implement secure changes to network architecture.
• Collaborate with teams for resilient network solutions.

Skills

TCP/IP

DNS

routing

switching

VLANs

load balancing

next-generation firewall technologies

network monitoring tools

OSI model

Tools

Cisco

Palo Alto

Checkpoint

PRTG

Nagios

Splunk

LogRhythm

Darktrace

Job description

A leading security firm in Stevenage seeks a Network Security Engineer to protect critical infrastructure in a 24/7 Incident Response role. The ideal candidate will have experience with enterprise firewalls and network monitoring tools, alongside a strong understanding of TCP/IP and advanced firewall technologies. This role offers competitive compensation, pension contributions, and additional perks.