Network Security Engineer

Salary: £55,000 - 65,000 per year

• Strong hands‑on experience operating and supporting enterprise firewall platforms, preferably Palo Alto, in complex environments.
• Proven background in network engineering, including routing, switching, and secure network design across Cisco and Aruba environments.
• Experience managing firewall policies, NAT, VPNs, and network segmentation in production environments.
• Practical experience with Network Access Control solutions such as Aruba Clear Pass or Cisco ISE, including authentication and device profiling.
• Experience supporting secure remote access solutions, including VPN and SSE/SASE platforms such as HPE SSE, in enterprise environments.
• Experience supporting multi‑site environments, including remote access and site‑to‑site connectivity.
• Demonstrated ability to troubleshoot complex firewall, network, and remote access issues under operational pressure.
• Experience working in OT or industrial environments, or other high‑availability, safety‑critical networks.
• Experience managing and assuring third‑party vendors, ensuring network and firewall changes are delivered to an appropriate standard.
• Strong operational discipline, including documentation, change control, and maintaining supportable configurations.
• Desirable: experience with Fortinet firewall platforms.
• Desirable: experience implementing or transitioning to modern network platforms or NAC solutions.
• Desirable: exposure to SSE/SASE architectures, including policy design and traffic steering.
• Desirable: experience designing or implementing network segmentation, particularly in OT or industrial environments.
• Desirable: knowledge of zero trust principles and modern approaches to network security.
• Desirable: experience with high availability firewall designs, including clustering and failover strategies.
• Desirable: familiarity with monitoring, logging, and traffic analysis tools for firewall and network environments.
• Desirable: scripting or automation experience, for example Python or APIs, to support network and firewall operations.

• Operate and maintain enterprise firewall platforms, ensuring secure, reliable connectivity across IT and OT environments.
• Design and implement firewall rules, NAT, and segmentation to support business and industrial systems.
• Lead firewall changes and troubleshooting, acting as the senior escalation point for complex network security issues.
• Drive continual improvement of firewall policies, focusing on rule optimisation, hygiene, and risk reduction.
• Support network design and security controls, with a focus on firewall placement, segmentation, and traffic control.
• Work closely with infrastructure, OT, and application teams to enable secure and resilient connectivity.
• Deliver firewall and network‑related projects, including upgrades, migrations, and new site deployments.
• Provide technical oversight of third parties, ensuring firewall and network changes meet operational and security standards.
• Maintain clear, accurate documentation of firewall configurations and network security controls.

• Aruba
• Cisco
• Firewall
• Support
• NAT
• Network
• Python
• Security
• VPN

This is a full‑time role based in Scunthorpe, North Lincolnshire, working 36.5 hours Monday to Friday. We offer a competitive package with salary up to £65,000, a defined contribution company pension scheme, 27 personal annual leave days plus statutory bank holidays, life assurance, company sick pay, a Health Cash Plan through Simplyhealth, an Employee Assistance Programme, standby and call‑out payments, and family‑friendly benefits including enhanced maternity, paternity, and adoption leave.

We also invest heavily in training and development and are an armed forces friendly company, actively encouraging applications from ex‑Armed Forces Personnel, Reservists, Armed Forces Veterans, and military spouses or partners.