**Job Summary** We are seeking a Senior Network Systems Engineer to join our Global Network Services team, operating and engineering the enterprise network that underpins NetApp worldwide. This is a deep technical role for an expert in Cisco routing, SD-WAN, and campus networking who can own complex infrastructure end to end - from design and deployment through day-two operations and escalated troubleshooting - across a global, multi-region estate. The team is evolving toward a cloud-first, automation-led operating model. While this role is anchored in deep networking expertise, the ideal candidate brings - or is eager to build - automation and infrastructure-as-code skills, and will help modernise how we operate: replacing manual, repetitive work with codified, repeatable engineering. You will be a senior technical voice on the team, mentoring others and setting the standard for engineering quality. **Job Responsibilites** + Own routing across the global routing estate - design, implement, and operate enterprise routing (BGP, OSPF,), including internet edge, WAN, and inter-site connectivity. + Engineer and operate the Cisco SD-WAN environment (Catalyst SD-WAN / Viptela) - policy design, template management, onboarding new sites, and troubleshooting overlay/underlay issues. + Lead campus networking across the global office and lab footprint - access/distribution/core, wireless, and network access - delivering reliable, secure, high-performance connectivity. + Resolve escalated operational issues (Tier 3/4) - act as the senior escalation point for complex incidents, driving root-cause analysis and permanent resolution. + Deliver new site builds, refreshes, and migrations - produce designs, interconnect matrices, and cutover plans; coordinate with vendors and installation partners through delivery. + Drive network changes through structured change control - plan, risk-assess, and execute changes with appropriate testing, validation, and rollback. + Maintain operational health through observability - use network monitoring and telemetry tooling to detect, diagnose, and pre-empt issues before they impact users. + Contribute to standards, runbooks, and documentation - raise the quality bar for how the team designs, operates, and hands off work. + Mentor junior engineers and share expertise - act as a technical mentor and multiplier across the team. + Support automation and modernisation - partner with automation/SRE colleagues to codify recurring tasks, moving the team from manual operations toward infrastructure as code. **Job Requirements** + **Routing** + Expert-level knowledge of enterprise routing: BGP, OSPF, EIGRP, route redistribution, path selection, and policy-based routing. + Hands-on experience operating routing on Cisco platforms (IOS-XE, ASR/ISR, Catalyst 8000) at enterprise scale. + Strong grasp of internet edge, WAN, and DIA circuit design, including working with service providers on connectivity and troubleshooting. **SD-WAN** + Deep expertise in Cisco SD-WAN (Catalyst SD-WAN / Viptela): control, management, and data plane; vManage/Catalyst Manager, vBond, vSmart. + Proven experience with SD-WAN policy design, template configuration, site onboarding, and overlay/underlay troubleshooting. + Understanding of transport-independent design across MPLS, broadband, and cellular, with application-aware routing and QoS. **Networking** + Expert knowledge of campus LAN architecture: access/distribution/core, Layer 2/Layer 3 design, spanning tree, VLANs, and first-hop redundancy (HSRP/VRRP). + Strong experience with Cisco campus switching (Catalyst 9000 series) or Juniper Switching. + Expertise in enterprise wireless - design, deployment, and troubleshooting of Cisco wireless (WLC, Catalyst/Meraki or Juniper Mist access points), RF planning, and roaming. + Familiarity with network access control and segmentation (Cisco ISE, 802.1X, TACACS+/RADIUS). **General** + Significant hands-on experience (typically 8+ years) in enterprise network engineering and operations, including a senior or lead technical role. + Demonstrated ownership of complex, high-impact network infrastructure in a global environment. + Strong troubleshooting discipline and structured incident-resolution skills under pressure. + Excellent communication skills, with the ability to work across regions and mentor others. **Nice to Have** + The following are not required, but will distinguish a strong candidate - particularly the automation and cloud capabilities that align with where the team is heading. + Scripting and automation experience - Python, Ansible, or similar - applied to network configuration or operations. + Exposure to infrastructure as code (Terraform) and network-as-code approaches. + Experience with workflow automation and orchestration platforms such as n8n - building automated workflows that connect network tooling, APIs, and operational processes. + Familiarity with the Model Context Pr