Senior Network Engineer

Job Description Position Summary The Senior Network Engineer is responsible for providing advanced support, design input, and ensuring operational excellence across a large-scale enterprise network comprising over 300 sites and hybrid cloud environments. This role serves as a Tier 3 escalation point within the India-based NOC, ensuring high availability, secure connectivity, and optimal network performance across on-premise and cloud infrastructure. This individual will play a critical role in supporting technologies such as Cisco switching, Meraki, ASA, Palo Alto firewalls, Zscaler (ZIA/ZPA), and SD-WANwhile also maintaining cloud networking capabilities in AWS and Azure. Engineering & Support - Serve as Tier 3 escalation for complex incidents involving routing, switching, firewalls, VPN, SD-WAN, and cloud interconnectivity - Perform root cause analysis and develop resolution plans for recurring or high-impact network issues - Maintain, configure, and troubleshoot enterprise-grade Cisco switching infrastructure (Catalyst, Meraki), ASA firewalls, and Palo Alto Networks firewalls - Support site-to-site and remote access VPN configurations and secure cloud access policies Monitoring & Optimization - Analyze alerts, network KPIs, and traffic flows to improve performance and reduce event noise - Tune SNMP, syslog, and NetFlow configurations for actionable network visibility - Review and refine monitoring setups in tools like LogicMonitor, PRTG, and SolarWinds Cloud & Zero Trust Integration - Maintain secure, scalable cloud networking configurations across AWS and Azure environments, including routing, security groups, ExpressRoute, and VNet/VPC peering - Support and optimize zero-trust implementations using Zscaler ZIA/ZPA or equivalent - Collaborate with Security Engineering on segmentation and policy enforcement across all network layers Automation & Change Management - Use scripting (Python, PowerShell, or Bash) to automate routine tasks, compliance checks, and configurations - Review, approve, and lead change implementation during maintenance windows - Ensure rollback procedures and documentation are in place for all planned changes Documentation & Team Enablement - Maintain network diagrams, topology documentation, and configuration baselines - Develop standard operating procedures (SOPs) and training material for NOC teams - Mentor junior NOC staff and guide incident handling and escalation strategies Required Qualifications - Degree in Computer Science, Information Technology, Networking, or a related discipline - 6+ years of experience in network operations, engineering, or support in enterprise environments - Proficiency in enterprise routing and switching (OSPF, BGP, VLAN, STP) - Hands-on experience with Cisco Catalyst and Meraki switches, ASA firewalls, and Palo Alto Networks - Strong understanding of SD-WAN technologies and dynamic routing integrations - Experience supporting Zscaler ZIA/ZPA and associated policy configuration - Working knowledge of cloud networking in AWS (VPC, TGW, Route 53, etc.) and Azure (VNet, NSG, ExpressRoute) - Familiarity with network monitoring and log analysis platforms such as LogicMonitor, SolarWinds, and Splunk - Participation in incident response and change control processes following ITIL or similar frameworks Preferred Qualifications - CCNP, PCNSE, or Zscaler certifications (ZCCA, ZCNA) - Experience with network segmentation and zero-trust architecture - Strong scripting ability (Python, PowerShell) for automation and diagnostics - Exposure to infrastructure-as-code or API-driven network management - Experience working in or supporting a 24/7 global NOC