Senior Network Engineer

Our client, a venture-backed defense technology company, is looking for a Senior Network Engineer to help advance and secure its mission-critical global infrastructure. You’ll design, deploy, and maintain resilient network systems for enterprise and development environments across data centres, on-premises sites, and public cloud networks.

You’ll work with cross-functional teams to automate and optimise network performance, availability, and security, supporting both classified and unclassified workloads. Limited travel to company sites may be required.

What you’ll do

Network engineering

• Work with public cloud networking in Azure and AWS, including secure connectivity models (ExpressRoute, Transit Gateway, Cloud WAN / vWAN)
• Design, architect, and implement routing, switching, WLAN, and firewall infrastructure across data centres and remote offices
• Deploy and manage WAN and VPN connectivity for enterprise and mission environments
• Develop network automation for provisioning, monitoring, and configuration management
• Collaborate with Cloud, Platform, Security, and Infrastructure teams on standardised network architectures that support self-service platforms and engineering automation
• Recommend and implement scalable, automated approaches to operational tasks and vulnerability remediation
• Contribute to Agile delivery cycles and manage assigned network projects
• Conduct capacity planning and recommend improvements

Operations and support

• Plan and execute network and firewall changes under change-management and security governance processes
• Monitor, analyse, and improve network performance, resiliency, and security posture
• Provide advanced troubleshooting for network hardware, software, and application issues
• Configure and maintain secure connectivity services (VPN/ZTNA, HTTPS, SFTP)
• Create and maintain operational and configuration documentation, and mentor operational teams
• Engage vendors and strategic partners on escalations, lifecycle planning, and technology evaluations
• Participate in on-call rotation and scheduled maintenance

Maintenance

• Lead or assist with network upgrades and patching within defined maintenance windows
• Maintain network device software and licence compliance
• Work with IT security teams to identify and remediate vulnerabilities

What we’re looking for

• 6+ years supporting and administering complex network systems in production environments
• Expertise in routing, switching, and security architectures
• Proficiency in at least one Network OS (NX-OS, JunOS, Arista EOS)
• Proficiency in at least one Network Security OS (PAN-OS, FortiOS)
• Experience with network automation and infrastructure-as-code (Terraform, Ansible, Python)
• Strong understanding of firewall management, segmentation, and VPN technologies
• Experience building and managing scalable hybrid connectivity between on-premises systems and cloud networks
• Strong analytical, organisational, and troubleshooting skills
• Clear written and verbal communication with both technical and non-technical audiences
• Ability to work independently in a structured, process-driven environment
• Bachelor’s degree in a technical discipline, or 6+ years of relevant experience with a professional certification (CCNP, JNCIS, VCP-NV, or equivalent)

Nice to have

• Juniper and Palo Alto experience, ideally with Panorama
• WLAN and wireless authentication (802.1x, RADIUS)
• NAC solutions and network access policy enforcement
• ZTNA / SASE experience (Prisma, Zscaler, or Cato)
• Working knowledge of VMware, Windows, or Linux administration
• Project management and leadership skills, and a collaborative, coaching mindset
• A solution-driven, adaptable approach in a fast-paced, change-controlled environment

Compensation: $140,000 – $211,000 per year