Network Engineer

La Fosse; Southampton; On-site; GBP 55,000 - 75,000; Full time

Benefits offered by this job

Wellbeing focus

Career development

Flexible working

Job summary

La Fosse in the United Kingdom is seeking an experienced Network Engineer to support and enhance an enterprise network spanning on-prem, cloud, and hybrid environments. This hands-on role focuses on maintaining, optimising, and improving network performance, resilience, and security across the business.

You will monitor LAN/WAN, troubleshoot major incidents, design solutions for routing, switching, and firewalling, and work with IT teams on projects and BAU delivery.

Qualifications

• Enterprise network experience with Cisco routing and switching
• Nexus and enterprise-grade infrastructure experience

Responsibilities

• Monitor, manage, and optimise network infrastructure across LAN, WAN, cloud, and hybrid environments
• Support and troubleshoot complex network issues, acting as 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 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

Skills

Communication

Stakeholder management

Ability to work under pressure

Problem solving

Education

CCNA Certification

Tools

Cisco ISE

F5

Checkpoint firewalls

Azure networking

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.