Network Security Engineer

  • Dublin
  • Permanent
  • Thu Dec 18 17:32:09 2025
  • 198729

Network Security Engineer

Location: Dublin
Type: Full-Time
Salary: €75,000 – €95,000

A security-focused technology environment is adding a Network Security Engineer to help own and protect core connectivity and perimeter services. This role sits close to day-to-day operations, combining hands-on troubleshooting with longer-term improvements to how network security controls are designed, maintained, and monitored.

It’s a role for someone who understands how networks behave under load, during incidents, and when things don’t fail cleanly.

The Role

You’ll support and secure enterprise network infrastructure, with a strong focus on firewalls, network segmentation, secure connectivity, and traffic visibility. Expect a mix of operational support, change work, investigation, and collaboration with SOC and infrastructure teams when security events cross network boundaries.

What You’ll Do

  • Operate and maintain network security controls (firewalls, VPNs, segmentation, gateways)

  • Investigate network-related security incidents and performance anomalies

  • Analyse traffic flows, logs, and packet captures to diagnose issues

  • Support firewall rule reviews, tuning, and lifecycle management

  • Work with SOC and IR teams during incidents affecting network layers

  • Assist with secure network design for new systems and services

  • Contribute to documentation, standards, and runbooks

  • Support change activity and continuous improvement initiatives

Skills & Experience

  • 4–7 years in network security or network-focused security engineering roles

  • Strong experience with enterprise firewalls and secure network architectures

  • Solid understanding of TCP/IP, routing, DNS, and network troubleshooting

  • Experience working with SIEM or network monitoring tools

  • Familiarity with cloud networking concepts (AWS or Azure)

  • Comfortable working in structured or regulated environments

  • Clear communication and a methodical troubleshooting approach

Reperio Human Capital acts as an Employment Agency and an Employment Business.