Surya Rajan

CCNA-certified Network Engineer with 4+ years of experience monitoring, implementing, and supporting enterprise LAN, WAN, and WLAN infrastructure. Skilled in configuring and troubleshooting Cisco Catalyst (9500/9300) and Juniper EX-series switches, and Cisco Meraki cloud-managed networks. Strong grounding in enterprise routing and switching (VLANs, STP, OSPF, EIGRP, BGP), firewall fundamentals, and network security.

Proven track record resolving 95%+ of critical incidents within SLA through structured root-cause analysis, TAC escalation, and ITIL-based incident management. Experienced with Cisco DNA Center (DNAC) for network automation and assurance. Recognized for reliability, clear cross-functional communication, and driving high-availability outcomes in mission-critical environments.

Senior Associate Network Engineer - Siemens AG - Chennai, India

(2022-09)

Client Project: Siemens AG (EMEA & India) | On-site: Chennai, India

• Manage and support enterprise LAN, WAN, and WLAN infrastructure for a global Siemens AG deployment spanning EMEA and India, ensuring high availability for business-critical operations.
• Configure and troubleshoot Cisco Catalyst (C9500, C9300) and Juniper (EX4600, EX3300) switches and routers, resolving complex L2/L3 connectivity and routing issues.
• Design and deploy VLAN segmentation, port-channel/EtherChannel configurations, and uplink architectures to improve network performance, resiliency, and redundancy.
• Partner directly with Cisco and Juniper TAC to escalate and resolve critical P1 incidents, minimizing downtime across the environment.
• Plan and execute IOS upgrade activities across the switch fleet, maintaining security compliance and platform stability.
• Consistently resolve 95%+ of assigned incidents within SLA by performing structured root cause analysis on connectivity and performance issues.
• Support to configuration of new Cisco switches, including device mounting, cabling, configuration, and testing.
• Conduct preventive health checks across access switches, internet-facing switches, and firewalls.
• Coordinate with ISP teams to diagnose and resolve link-down incidents, leading root-cause analysis during P1 bridge calls.
• Manage device maintenance windows and lifecycle scheduling in Cisco DNA Center (DNAC), Other monitoring tools (Spectrum, SolarWinds) and mentor on-site field engineers through complex troubleshooting escalations.

Bachelor of Engineering (BE) - Electronics & Communication Engineering - P.A. College of Engineering and Technology (2022-06)