Senior Network Security Engineer

Salary: £70,000 - 70,000 per year

Requirements:

• A good background in Network Security within a large scale, complex organisation
• Experience setting up, maintaining, and upgrading firewalls
• In-depth experience of at least one of the following: Fortinet, Cisco ASA/Firepower, Check Point, or Palo Alto
• Experience within a large scale, complex organisation; managed service, consultancy, or B2B experience would be highly beneficial
• Recent experience dealing with major incidents involving networks and firewalls
• Industry certifications may be required for top-end salaries, such as Fortinet NSE 4/5/6/7, Check Point CCSA/CCSE, Palo Alto PCNSA/PCNSE, or Cisco CCNA/CCNP
• Eligibility to obtain SC clearance

Responsibilities:

• Join our existing Network Security team and work alongside our SOC
• Set up, maintain, patch, and upgrade customer firewalls
• Actively work on client firewalls
• Complete firewall upgrades
• Run IPS and IDS
• Perform log reviews
• Carry out general BAU tasks such as VPN creation
• Support a variety of clients by helping to set up, maintain, monitor, and secure their networks
• Deal appropriately with major incidents
• Ensure appropriate steps are in place and followed for vulnerability remediation
• Perform safe upgrades and patches where required
• Provide accurate and informed security insights internally and to our customers
• Ensure incident response levels are appropriate

Technologies:

• Cisco
• Firewall
• Support
• Network
• Security
• VPN

More:

We are a renowned organisation experiencing continued growth, and we are looking for talented Network Security Engineers to join us in a managed service environment in Sheffield City Centre. This is a hybrid role offering the opportunity to progress your network security career, with a competitive salary of £50,000 to £70,000, a 10% on-target bonus that can rise to 15% based on performance, study leave and paid network security certifications, internal progression opportunities, 25 days annual leave plus bank holidays, a generous pension scheme, flexible working arrangements, and other company-specific benefits.

last updated 37 week of 2026