Senior Network Engineer

Senior Network Engineer

Location: Cambridge, UK

Working Model: Hybrid - 2 days per week onsite

Contract Type: Contract

Experience: 10+ years relevant experience

Role Overview

We are looking for an experienced Senior Network Engineer with strong expertise in Network Source of Truth, NetBox, network automation and network reliability .

The role will focus on establishing and maintaining NetBox as the authoritative source of record for enterprise network data , improving network inventory accuracy, automation, governance and integration with enterprise platforms such as ServiceNow .

The successful candidate will also contribute towards expanding network automation and developing a strategic roadmap towards Network SRE practices .

Key Responsibilities

• Review and improve the existing network data landscape, data quality and integrations.
• Develop and enhance NetBox for enterprise network inventory and lifecycle management.
• Establish NetBox as the trusted source of record for network assets, topology, IP addressing and metadata.
• Design and implement automated network discovery and data-assurance capabilities.
• Define and maintain NetBox data models, naming conventions, taxonomy and hierarchical structures.
• Integrate NetBox with network management and assurance platforms, including Cisco Catalyst Centre .
• Develop integrations between NetBox and ServiceNow CMDB/ITSM .
• Automate network discovery, compliance reporting, auditing and configuration validation.
• Expand network automation using Python, Ansible, REST APIs and, where applicable, Terraform.
• Develop reusable automation workflows, operational runbooks and documentation.
• Perform network device baselining and configuration validation.
• Improve network monitoring, data quality and operational reliability.
• Define KPIs, SLIs and SLOs to support Network SRE practices.
• Identify opportunities for proactive monitoring, fault prevention and self-healing automation.
• Work closely with Operations, Security, Architecture, Platform and ITSM teams.

Required Technical Skills

• Network Source of Truth / IPAM / DCIM
• Hands-on experience with one or more of:
• NetBox
• Nautobot
• IP Fabric
• Auvik
• SolarWinds
• Device42
• Infoblox
• Core Networking
• Routing & Switching
• TCP/IP
• BGP
• OSPF
• MPLS
• VLANs
• WAN/LAN
• SD-WAN
• Network Security Fundamentals
• Network Automation
• Python
• Ansible
• REST APIs
• Terraform - desirable
• PowerShell - desirable
• Git / GitHub - desirable
• Monitoring & Observability

Preferred Certifications

• Cisco CCNP / CCIE
• Juniper JNCIS / JNCIP
• AWS Advanced Networking Specialty
• Relevant NetBox, Python, automation or Infrastructure-as-Code certifications

Ideal Candidate

The ideal candidate will have strong experience in enterprise networking, NetBox/Network Source of Truth, network automation and data governance , with the ability to work across network operations, architecture, security and ITSM teams.

Experience with ServiceNow CMDB integration, Python/Ansible automation and Network SRE concepts would be highly valuable.