Network Security Engineer – Fortinet / Cisco

Network Security Engineer – Fortinet / Cisco Location: Bromley South (Office Based During Training Period)

Job Type: Full-Time

We are looking for a motivated and technically strong Network Security Engineer to join our small but highly capable infrastructure team. This is an exciting opportunity for someone with strong Fortinet/FortiGate experience and Cisco patching expertise who is looking to play a key role in maintaining and improving a secure and resilient IT environment.

As part of a close-knit team, you will be instrumental in maintaining and enhancing the organisation’s network infrastructure, ensuring optimal performance, up-to-date security, and high reliability across all systems. We are looking for an individual who brings ideas, enthusiasm, and a collaborative approach, with the primary objective of supporting existing team members while enhancing the delivery of security-focused updates and improvements to the infrastructure.

The role will be primarily network focused; however, due to the size of the team, there will also be opportunities and expectations to contribute to wider infrastructure and security projects.

Key Responsibilities • Manage, maintain, and support Fortinet/FortiGate firewall environments

• Perform Cisco network patching, upgrades, and maintenance activities


• Monitor network performance, security, and availability


• Implement security updates and best practices across the infrastructure


• Support infrastructure improvement and security enhancement projects


• Troubleshoot network and connectivity issues across the business


• Work closely with internal teams to maintain a secure and stable IT environment


• Assist with documentation, change management, and operational procedures

Skills & Experience Required • Strong hands-on experience with Fortinet/FortiGate technologies

• Experience with Cisco networking and patch management


• Good understanding of network security principles and best practices


• Experience supporting enterprise network infrastructure


• Ability to troubleshoot complex networking issues


• Knowledge of switching, routing, VLANs, VPNs, and firewall policies


• Strong communication and team collaboration skills


• Proactive mindset with a willingness to contribute ideas and improvements

Desirable Skills • Experience working within small infrastructure or IT teams

• Exposure to infrastructure and security project delivery


• Relevant Fortinet or Cisco certifications


• Experience with network monitoring and security tools

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