Network Engineer

La Fosse; Southampton; On-site; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Wellbeing focus

Flexible working

Career development

Job summary

La Fosse is seeking an experienced Network Engineer to support and enhance a complex enterprise network spanning on-prem, cloud, and hybrid environments. The role focuses on BAU operations and project delivery, ensuring high availability, performance, and security across the business.

The ideal candidate will have strong Cisco routing/switching, Nexus experience, firewall/VPN skills, and familiarity with ITIL processes.

Qualifications

• Experience in enterprise network environments is essential.
• Strong Cisco routing & switching expertise and familiarity with Nexus switches.
• Hands-on firewall, VPN, and security technologies experience required.

Responsibilities

• Monitor and optimise network infrastructure across LAN/WAN/cloud/hybrid environments.
• Troubleshoot complex network incidents and act as escalation point.
• Design and implement network solutions for routing, switching, security, and connectivity.

Skills

Cisco routing

Cisco switching

Nexus switches

Firewall management

VPN technologies

Wireless networks

Data centre networking

ITIL processes

Incident & change mgmt

Cloud networking

PowerShell automation

Python automation

Communication skills

CCNA

Cisco ISE

F5 / Check Point

Education

Cisco CCNA certification

Tools

Cisco ISE

F5

Check Point

PowerShell

Python

Job description

We’re working with a well-established UK financial services organisation who are looking to bring in an experienced Network Engineer to support and enhance their enterprise network environment.

This is a hands-on role where you’ll be responsible for maintaining, optimising, and improving a complex network estate spanning on-prem, cloud, and hybrid environments. You’ll play a key role in both BAU operations and project delivery, ensuring high availability, performance, and security across the business.

Key Responsibilities

• Monitor, manage, and optimise network infrastructure across LAN, WAN, cloud, and hybrid environments
• Support and troubleshoot complex network issues, acting as an escalation point for major incidents
• Design and implement network solutions across routing, switching, security, and connectivity
• Maintain high availability and resilience across the network estate
• Contribute to root cause analysis (RCA) and continuous improvement initiatives
• Support network change activity in line with governance and security policies
• Monitor and manage data centre and network environments including LAN, WAN, and wireless
• Collaborate with wider infrastructure and IT teams to support projects and BAU delivery
• Contribute to network documentation and operational best practices

Experience Required

• Strong experience working within enterprise network environments
• Cisco-focused networking expertise (routing & switching, Nexus, enterprise-grade infrastructure)
• Experience managing firewalls, VPNs, and network security technologies
• Hands-on experience with wireless networking (APs, controllers)
• Experience supporting large-scale network environments
• Understanding of network design, architecture, and traffic flow
• Familiarity with ITIL processes such as incident, change, and problem management
• Ability to work under pressure and support multiple concurrent priorities
• Strong communication and stakeholder engagement skills
• CCNA (or equivalent certification)
• Experience with cloud networking (Azure or hybrid environments)
• Exposure to tools such as Cisco ISE, F5, or Checkpoint firewalls
• Experience with automation or scripting (PowerShell/Python)

What’s on Offer

• Strong focus on wellbeing, flexibility, and career development
• Opportunity to work within a high-performing, collaborative team
• Exposure to modernisation and network transformation projects

If you’re a Network Engineer looking to work in a stable but forward-moving environment with strong investment into infrastructure and people, this is a great opportunity to step into a visible and impactful role.