Network Engineer

La Fosse Associates; Southampton; On-site; GBP 58,500 - 71,500; Full time

Benefits offered by this job

Hybrid working model

Wellbeing and flexibility

Career development

Collaborative team

Job summary

La Fosse Associates in Southampton, United Kingdom, is seeking a Network Engineer to support and enhance an enterprise network environment across on-prem, cloud, and hybrid estates. The role combines BAU operations with project delivery, ensuring high availability, performance, and security.

You will design and implement solutions for routing, switching, and security, while maintaining network documentation and best practices.

Qualifications

• Experience in enterprise network environments.
• Knowledge of Cisco routing and switching, Nexus platforms.
• Experience with firewalls, VPNs and network security.

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 RCA and continuous improvement initiatives.
• Support network change activity in line with governance and security policies.
• Monitor 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.

Skills

Enterprise networking

Cisco routing

Cisco switching

Firewalls & VPNs

Wireless networking

Network design

ITIL processes

Stakeholder engagement

Tools

Cisco ISE

F5

Checkpoint firewall

PowerShell

Python

Job description

Network Engineer

Location: Southampton (4 days on-site)
Salary: £65,000 + 10% bonus

About the Role

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

Desirable

• 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

• Hybrid working model
• 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.

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