Senior Network Systems Engineer

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 Net App 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.

• Own routing across the global routing estate — design, implement, and operate enterprise routing (BGP, OSPF, EIGRP, route redistribution, path selection, and policy‑based routing), 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.

• Routing: expert‑level knowledge of enterprise routing, including 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.

• 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.

• 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).

• 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…