Job title network engineer – level 3 (l3) job summary the network l3 engineer is a senior technical expert responsible for the design, engineering, implementation, and advanced troubleshooting of enterprise network infrastructure. This role acts as the highest escalation point from l1/l2 teams, leads complex problem resolution, and provides long‑term architectural and operational improvements to ensure network stability, scalability, and performance. Key responsibilities network engineering & design • design and engineer enterprise‑scale network solutions (lan, wan, wlan, data center, cloud connectivity). • create and maintain logical and physical network designs aligned with enterprise architecture standards. • translate business and application requirements into actionable network designs and configurations. Implementation & change management • develop and validate network configuration scripts for routers, switches, firewalls, and load balancers. • execute network changes during approved change windows, including after‑hours implementations. • review and validate change documentation prepared by other engineers to ensure technical accuracy and risk mitigation. Advanced troubleshooting & escalations • act as l3 escalation support for complex and chronic incidents not resolved by l1/l2 teams. • perform deep root cause analysis (rca) and implement permanent fixes. • troubleshoot across multi‑vendor, multi‑technology environments (on‑prem, hybrid, and cloud). Operational excellence • establish and improve testing processes for applications and devices prior to production deployment. • identify optimization, automation, and standardization opportunities. • participate in on‑call and escalation rotations as required. • support problem management and continuous improvement initiatives. Technical leadership & collaboration • lead technical discussions with customers, stakeholders, and internal teams. • serve as a technical mentor and sme for junior engineers. • provide guidance on data, voice, vpn, and mobile network capabilities. • ensure a high‑quality customer experience in all technical interactions. Required technical skills core networking • strong expertise in routing and switching (bgp, ospf, eigrp, stp, vlans). • hands‑on experience with cisco enterprise networking solutions. • deep understanding of enterprise wan technologies (mpls, sd‑wan, vpn). Security & infrastructure • experience with firewalls, load balancers, and network security concepts. • knowledge of network segmentation, access control, and secure connectivity. Tools & environments • experience in multi‑site, global enterprise network environments. • familiarity with itil processes (incident, change, problem management). • exposure to cloud networking concepts (azure/aws/gcp) is a plus. Qualifications & experience • 6 years of enterprise network engineering experience. • 4 years operating at l3 / senior engineering level. • proven experience working on complex, large‑scale network environments. • relevant certifications preferred: • ccnp / ccie (or equivalent) • cloud networking certifications (optional) soft skills • strong analytical and problem‑solving skills • clear technical communication (written and verbal) • ability to work independently and lead technical initiatives • proactive, customer‑focused mindset • comfortable working in 24×7 or on‑call support models when required