Network Engineer - SC Clearance

Experis Austria; United Kingdom; Hybrid; GBP 120,000 - 155,000; Full time

Job summary

Experis Austria is seeking a Network Engineer to join a high-profile programme delivering critical infrastructure in a secure environment. You will design, implement and support enterprise network infrastructure across physical and virtual environments, ensuring robust, secure, and scalable networking for mission-critical systems.

The role requires strong Cisco expertise with OSPF/BGP, VXLAN, and secure segmentation. SC clearance or eligibility is essential.

Qualifications

• Strong experience in enterprise network engineering across design, implementation and support.
• Solid understanding of TCP/IP, subnetting, routing and address management.
• Hands-on with OSPF and BGP routing protocols.
• Experience with enterprise networking equipment including routers, switches and firewalls.
• Experience with Cisco Nexus, IOS-XE, VXLAN and leaf-spine architectures.
• Knowledge of network security technologies including firewalls, IDS/IPS and AAA platforms.
• Ability to produce technical documentation such as LLDs and build guides.
• CCNP Enterprise or equivalent certification preferred.

Responsibilities

• Design, implement, and support enterprise network infrastructure across physical and virtual environments.
• Configure and manage routers, switches and firewalls.
• Deliver modern network architectures including leaf-spine, SDN and virtualised networking.
• Configure routing protocols and implement core network services like IP addressing, VLANs and QoS.
• Deploy overlay networking technologies such as VXLAN and secure networking policies.
• Produce and maintain technical documentation and runbooks.
• Collaborate with service management to troubleshoot incidents and improve stability.
• Contribute to automation and continuous improvement initiatives.

Skills

Enterprise network engineering

IP networking fundamentals

OSPF

BGP

Routers

Switches

Firewalls

VXLAN

Leaf-Spine

Cisco Nexus

Cisco IOS-XE

Security technologies

QoS

LLDs

Troubleshooting

JIRA

Confluence

Tools

JIRA

Confluence

Job description

Network Engineer
Location: UK (Hybrid/On-site as required)
Clearance: Must hold or be eligible for UK Security Clearance (SC)
Rate: Up to 675 per day via an approved umbrella company

Overview

We are seeking an experienced Network Engineer to join a high-profile programme delivering critical infrastructure capabilities within a secure and complex technical environment.

The successful candidate will play a key role in the design, implementation, and support of enterprise network infrastructure, providing the connectivity foundation for mission-critical systems and services. Working across both physical and virtual network environments, you will be responsible for delivering robust, secure, and scalable networking solutions throughout the full project lifecycle, from design and build through to integration, testing, and operational support.

This is an excellent opportunity for a network professional with strong Cisco expertise and a passion for delivering resilient enterprise-scale solutions within highly regulated environments.

Key Responsibilities

• Design, implement, and support enterprise network infrastructure across physical and virtual environments.
• Configure and manage network devices including:
  • Routers
  • Switches
  • Firewalls
• Deliver modern network architectures including:
  • Leaf-Spine networks
  • Software-Defined Networking (SDN)
  • Virtualised networking platforms
• Configure, maintain, and troubleshoot dynamic routing protocols including:
  • OSPF
  • BGP
• Implement and support core network services including:
  • IP Addressing
  • Subnetting
  • VLANs
  • QoS
  • Traffic Management
• Deploy and manage overlay networking technologies such as VXLAN.
• Implement secure networking solutions, including firewall policies, IDS/IPS technologies, and secure communications.
• Support network integration, testing, validation, and commissioning activities.
• Produce and maintain technical documentation including:
  • Low-Level Designs (LLDs)
  • Network Build Guides
  • Configuration Standards
  • Operational Runbooks
• Work closely with Service Management teams to troubleshoot, investigate, and resolve incidents and service issues.
• Conduct root cause analysis and recommend improvements to increase service stability.
• Contribute to automation, standardisation, and continuous improvement initiatives across the network estate.
• Ensure all solutions align with programme standards, governance requirements, and security policies.

Essential Skills & Experience

To be successful in this role, you will have:

• Strong experience in enterprise network engineering, including design, implementation, administration, and troubleshooting.
• Excellent understanding of IP networking fundamentals, including:
  • TCP/IP
  • Subnetting
  • Routing
  • Address Management
• Hands-on experience configuring and supporting routing protocols, particularly:
  • OSPF
  • BGP
• Advanced knowledge of enterprise networking equipment including:
  • Routers
  • Switches
  • Firewalls
• Experience with enterprise networking technologies such as:
  • Cisco Nexus
  • Cisco IOS-XE
  • Leaf-Spine Architectures
  • VXLAN
• Strong understanding of network security technologies including:
  • Firewalls
  • IDS/IPS
  • AAA Platforms
  • Secure Network Segmentation
• Experience implementing and managing QoS policies and traffic optimisation techniques.
• Ability to produce and maintain technical documentation including LLDs, build guides, and operational procedures.
• Strong analytical and troubleshooting skills with a methodical approach to problem solving.
• Excellent communication and stakeholder management skills.
• Relevant industry certification such as:
  • CCNP Enterprise
  • Equivalent networking certification
• Must hold, or be eligible to obtain, SC Clearance.

Desirable Skills & Experience

The following would be advantageous:

• Experience working within Defence, Government, National Security, or other highly regulated environments.
• Knowledge of defence-grade networks and secure gateway architectures.
• Experience supporting large-scale, virtualised, or software-defined infrastructure environments.
• Familiarity with Agile delivery methodologies.
• Experience using Atlassian toolsets including:
  • JIRA
  • Confluence
• Experience designing and managing secure multi-tenanted network architectures.
• Exposure to automation and infrastructure-as-code approaches within networking environments.
• Additional industry certifications such as:
  • CCIE
  • VMware VCP-NV
  • Chartered Engineer (CEng)
• Knowledge of cloud networking and hybrid infrastructure environments.