Network Security Engineer

Cirrus Selection; Stevenage; On-site; GBP 50,000; Full time

Job summary

A leading tech company in the UK is seeking a Network Security Engineer to support 24/7 security operations and enhance existing network infrastructure. The role requires strong expertise in configuring firewalls and knowledge of networking principles like TCP/IP and DNS. Successful applicants will receive a competitive salary around £50,000, along with a bonus, pension scheme, and extensive leave options. Security clearance is essential, and candidates must be British citizens.

Benefits

Competitive salary

Generous pension scheme

Bonus incentives

Extensive leave options

Qualifications

• Strong understanding of TCP/IP, DNS, routing, switching, VLANs, and load balancing.
• Hands-on experience with Checkpoint, Cisco, Palo Alto firewalls.
• Knowledge of IPS/IDS, SSL decryption, deep packet inspection, and VPNs.

Responsibilities

• Support 24/7 security operations as part of the ISR team.
• Design, implement, and maintain robust security solutions.
• Collaborate with teams to enhance security policies and identify vulnerabilities.

Skills

Networking principles

Firewall configuration

IPS/IDS knowledge

Secure proxy solutions

Security protocols (IPSec, SSL/TLS)

Tools

Checkpoint

Cisco

Palo Alto

Bluecoat

Nagios

PRTG

Job description

Network Security Engineer

Location: Stevenage

What’s on offer:

Alongside a competitive salary of circa £50,000 + shift allowance, enjoy a generous pension scheme, overtime, bonus incentives, and extensive leave options.

If you’re passionate about safeguarding networks and possess strong expertise with industry-leading security tools, this Network Security Engineer position could be a perfect opportunity for you.

What you’ll be doing as the Network Security Engineer

• Supporting 24/7 security operations as part of the Internal Security Response (ISR) team, with a focus on incident response and triage.
• Designing, implementing, and maintaining robust security solutions around network infrastructure.
• Collaborating with cross-functional teams to enhance security policies, identify vulnerabilities, and optimise network tools.
• Engaging with firewalls such as Checkpoint, Cisco, or Palo Alto, and managing secure proxy solutions like Bluecoat and Riverbed.
• Monitoring, troubleshooting, and fine-tuning network architectures, routing, switching, VLANs, and load balancing features.

Network Security Engineer experience & skills

• Strong understanding of networking principles - TCP/IP, DNS, routing, switching, VLANs, and load balancing.
• Hands‑on experience configuring, maintaining and troubleshooting firewalls (Checkpoint, Cisco, Palo Alto, Bluecoat).
• Knowledge of IPS/IDS, SSL decryption, deep packet inspection, and VPNs.
• Experience managing secure proxy solutions, and monitoring platforms like Nagios or PRTG.
• Familiarity with security protocols such as IPSec, SSL/TLS, and two‑factor authentication.

Security clearance is essential – applicants must be British citizens and will undergo DV clearance.

Get in touch

If you meet the criteria and are eager to make an impact within a forward‑thinking, innovative environment, we welcome your application.