Network & Firewall Specialist

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Network & Firewall Specialist

Posting Date: 16 Jul 2025

Unit: Networks

Location: One Braham (4140), London, United Kingdom

Salary: competitive with great benefits

Recruiter: Luke Byrne

Internal Closing Date: 5/8/25

Location: London or Ipswich

As the Network & Firewall Specialist, you will be responsible for the end-to-end design, operation, and support of the Network and Firewall estate for the Media Cloud infrastructure. You will have autonomy in assisting with roadmaps and the technical direction of the platform, including new partners or technologies used. This platform supports our EE TV product as well as our Media & Broadcast customers (BBC, ITV, The Premier League, Freeview, and many more). It's critical to our business, so it needs to be supported with high levels of availability and minimal outages. You will work closely with internal squads, all of which work in an agile fashion. An ideal candidate will also be willing to support the teams on on-call commitments.

What you'll be doing

• Maintaining and administering Cisco networks, Check Point Firewalls & Management
• Troubleshooting, diagnosing, and resolving hardware, software, and other network defects
• Maintain integration with required monitoring tools to ensure operational observability
• Perform network changes to the firewall estate in support of Agile Delivery programs and Delivery teams
• Plan, coordinate, and implement network security measures, enhancements, and upgrades
• Design new or changes to our network and firewall estate
• Maintain a strong security posture of our environments, keeping up to date with the latest security vulnerabilities
• Work in an agile way (SCRUM/Kanban)
• Be an escalation point for 2nd/3rd line support tickets
• Raise changes for maintenance work in SNOW and Remedy, and coordinate changes and approval process
• Document new and existing processes to share knowledge throughout the wider Core squad using wiki
• Work in an agile manner using JIRA of a DevOps mindset across the engineering teams
• Identify and work on continuous improvement opportunities to enhance team processes
• Perform capacity management
• Keep up to date with the latest technologies and industry trends
• Build good working relationships with customers and suppliers, with effective communication

Skills and Experience

• Cisco Networking
• Check Point Firewalls, including VSX and Maestro/Scalable Platforms
• VMware NSX
• ITIL framework knowledge and experience
• Knowledge of agile ways of working (SCRUM/Kanban)
• Experience in an operations environment
• Technology Strategy
• Automation experience
• Cloud Computing
• Growth Mindset
• Excellent communication skills

Experience you'd be expected to have

• Designing, upgrading, operating, and supporting Cisco networks
• Designing, upgrading, operating, and supporting Check Point Firewalls
• Designing, upgrading, operating, and supporting VMware NSX networking/SDN
• Good security experience and best practices
• Experience in agile ways of working
• Experience working with both technical and non-technical stakeholders
• Collaborating with internal and external teams to evaluate and validate new technologies/patterns

Preferred Experience

• Membership of professional bodies/standards organizations
• Operational role experience
• Current Cisco certifications
• Current Check Point certifications
• Experience with on-call and occasional overnight change windows

Benefits include a 10% target bonus, BT Pension scheme, family leave, health support, annual leave, private GP, carers leave, training, and share schemes.

About us

BT Group is a leading telco with a rich heritage, investing heavily in digital infrastructure, 5G, and AI to revolutionize connectivity and customer experience. We value diversity and encourage applications from all backgrounds, including flexible working arrangements and reasonable adjustments during the hiring process.