Start: ASAP
IR35 Status: Inside
A Senior Network Engineer is required for our Government client to be responsible for designing, implementing, securing and maintaining enterprise network infrastructure with a focus on high availability, performance and resilience.
This role provides advanced technical leadership across routing, switching, firewall administration and network security operations. You will also serve as an escalation point for complex issues involving Cisco switching platforms, Cisco Firepower Threat Defence (FTD) and Palo Alto Networks Next‑Generation Firewalls, ensuring the network reliably supports business operations.
Responsibilities include:
* Enterprise LAN/WAN design, optimisation and lifecycle management
* Firewall, IPS/IDS, and network security policy management
* Advanced troubleshooting of network performance, connectivity, and security issues
* Leading network modernisation, migration, and automation initiatives
* Ensuring compliance with security frameworks and organizational standards
* Collaboration with cross‑functional IT teams to deliver secure, scalable solutions
Essential Skills & Experience required:
As the Senior Network Engineer you will possess the following skills & experience:
* Experience of support and design working within highly secure environments - essential
* Cisco Switching, Routing, Security and wireless technologies
* Network Protocols TCP/IP, BGP, ICMP, OSPF, IPSEC
* Cisco ASA Firewall Administration and design
* Palo Alto Firewall administration
* Knowledge of Virtual Environments and virtual network solutions (ie VMWare)
* Experience in Cisco ISE and PRIME
* BIG IP F5 Administration / Configuration – LTM, ASM
* Network Monitoring PRTG
Desirable Skills and Experience:
* Experience of working within a variety of ITIL4 environments
* Knowledge of IT Service Management toolsets (ie ServiceNow)
* Key performance reporting and documentation
* Stakeholder Management
* Experience of working in Government Sector
If this role is of interest please email your CV to: joanne.stanley@certes.co.uk
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