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