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# Network Support Engineer - ACI and Firewalls

- **Company:** Networking People Limited
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £117,000.0 - £130,000.0
- **Contract:** Temporary contract
- **Skills:** Cisco PIX, Data Centers, Network Security, Network Installation Services, Routing, Cisco Nexus Switches, Firewalls (Computer Science), Network Support, Fortinet, Cisco Switches, Cisco
- **Published:** September 23, 2026
- **Apply:** https://www.totaljobs.com/job/network-support-engineer/networking-people-uk-limited-job108019870

## About the Role

* 8+ years' experience in network implementation, support or network security engineering.
 * CCNP certified as a minimum baseline.
 * Strong hands-on network and security troubleshooting experience.
 * Excellent analytical and problem-solving skills, with strong attention to detail.
 * A proactive approach and strong work ethic - attitude and approach are as important as certifications.
 * Comfortable working within an environment where systems, processes and access arrangements are still being consolidated following a merger.
 * Experience working in a high-availability or business-critical environment is highly desirable, particularly within financial services / banking.

Technical Skills

Strong experience across a number of the following:

 * Cisco CCNP / CCIE-level networking
 * Cisco Catalyst Switches
 * Cisco ASA
 * Cisco ACI Fabrics - implementation and troubleshooting
 * Fortinet Firewalls
 * Palo Alto Firewalls
 * Network security and firewall troubleshooting
 * Complex routing, switching and connectivity troubleshooting

## Description

We're looking for an experienced Network Security Engineer to join a busy operations team supporting a large Banking client project across enterprise networks and Data Centre networks.

This is primarily a BAU operations and troubleshooting role, rather than a project or deployment-focused position. You'll play a key role in resolving network and security incidents, troubleshooting complex issues across a mixed technology stack.

The Role

You'll be responsible for:

 * Providing 3rd-line network and security support across a complex banking environment.
 * Investigating and resolving BAU incidents, faults and service issues.
 * Troubleshooting across multiple network and security technologies.
 * Working as part of a team that is continuing to consolidate systems, access and processes following a merger.
 * Supporting occasional project and change activity alongside the core BAU workload.
 * Participating in scheduled out-of-hours changes, typically Friday evening through Sunday, with the workload shared across the team.
 * Working closely with the NOC, which provides the primary on-call coverage.
 * Maintaining a high standard of technical documentation, investigation and incident resolution.


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