Overview
Work History
Education
Skills
Accomplishments
Certification
Timeline
Generic

Shrijith Nair

Bengaluru

Overview

5
5
years of professional experience
3
3
Certifications

Work History

Network Consulting Engineer II

Cisco Systems
01.2023 - Current
  • Served as a senior Cisco TAC Network, Collaboration, SDWAN and Security Engineer, leading high-severity incidents and escalations for enterprise, government, defense, and regulated customers, including NASA, US Defense forces, and Indian Defense forces. Consulted directly with customer network, security, and operations teams to perform rapid root-cause analysis, troubleshoot mission-critical Cisco infrastructures, and restore services, incorporating 3 years of experience with MPLS, VPN, routing protocols, ethernet switching, configuring enterprise-class routers, switches, and firewalls.
  • Specialized in Cisco Collaboration and Calling platforms (CUCM / Webex Calling, Unity Connection, IM & Presence, UCCX, CCE, Expressway, Webex services), troubleshooting complex VoIP and telecom issues involving SIP, SIP-TLS, SCCP, MGCP, RTP/RTCP, SRTP, codec negotiation, dial plans, call routing, QoS, and media traversal across WANs and firewalls, with Experience working with unix systems administration and network protocols troubleshooting.
  • Hands-on experience with network security technologies including Cisco ASA, FTD, FMC, and ISE; analyzed and configured firewall policies, NAT, ACLs, VPNs, TLS/SSL, PKI, and identity-based access controls. Contributed to incident response, vulnerability analysis, secure architecture assessments, and bug/vulnerability reporting across Cisco platforms and Linux-based systems, featuring Experience with WAN technologies/protocols like MPLS, BGP, MACsec, IPsec, SDWAN, inter-domain IP Routing Policy, and TCP/IP.
  • Led large-scale network-related automation initiatives, including framework development for automated installation and delivery of 2000+ Linux-based Collaboration VMs, significantly reducing provisioning time and operational costs, using Experience with Python, Bash or other scripting language.
  • Designed and implemented internal monitoring and analytics solutions for customer insights, delivery metrics, and operational telemetry using Splunk, Prometheus, and Grafana, leveraging Knowledge of Local Area Network (LAN) switching and wireless network fundamentals as well as Knowledge of wireless networking and protocols.

Network Consulting Engineer I

Cisco Systems
01.2022 - 01.2023
  • Supported enterprise customers as a Cisco TAC Network Engineer on complex networking, collaboration, and security incidents across routing, switching, firewall, and VoIP domains. Managed customer-facing incident workflows, troubleshooting, and resolution, with 3 years of experience with MPLS, VPN, routing protocols, ethernet switching, configuring enterprise-class routers, switches, and firewalls.
  • Worked extensively with Cisco Collaboration and VoIP environments (CUCM, Webex Calling, Unity Connection, UCCX), resolving call-flow issues involving SIP, H.323, SCCP, MGCP, RTP/RTCP, NAT traversal, QoS, and codec negotiation through detailed analysis of packet captures, debugs, syslogs, and signaling traces, including Experience working with unix systems administration and network protocols troubleshooting.
  • Gained strong exposure to Cisco security solutions (ASA, FTD, FMC, ISE), configuring and troubleshooting firewall rules, VPN connectivity, TLS/SSL, certificates, AAA, and access controls. Contributed to bug reporting, vulnerability identification, and security incident investigations, incorporating Experience with WAN technologies/protocols like MPLS, BGP, MACsec, IPsec, SDWAN, inter-domain IP Routing Policy, and TCP/IP.
  • Supported network implementation and operational efficiency through scripting, tooling, and development of internal dashboards and admin portals, utilizing Experience with Python, Bash or other scripting language.
  • Built foundational expertise in enterprise networking, Cisco Collaboration, VoIP, routing, switching, and firewall troubleshooting under senior engineers, with Knowledge of Local Area Network (LAN) switching and wireless network fundamentals plus Knowledge of wireless networking and protocols.
  • Assisted in incident management, customer communication, documentation, and secure network operations best practices.
  • Contributed to automation scripting and internal tool development to support network implementation and operational workflows.

Full Stack Developer (Intern)

Sulekha.com
01.2021 - 01.2022
  • Developed frontend components using Vue.js, HTML, and CSS for chat windows and user interfaces, gaining early exposure to application development supporting network-related systems.

Education

Master of Technology - Artificial Intelligence And Data Science

Indian Institute Of Information Technology
Dharwad

Bachelor Of Engineering - Computer Science

Anna University

Army Public School
Chennai

Skills

  • Python, Bash or other scripting language
  • Cisco Collaboration: CUCM, Webex Calling, Unity Connection, IM & Presence, UCCX, CCE, Expressway
  • VoIP/Telecom Protocols: SIP, SIP-TLS, H323, MGCP, SCCP, RTP/RTCP, SRTP, codec negotiation, dial plans, call routing, QoS, media traversal
  • Network Security: Cisco ASA, FTD, FMC, ISE, Firewall policies, NAT, ACLs, VPNs, TLS/SSL, PKI, identity-based access controls
  • Routing & Switching: MPLS, BGP, routing protocols, ethernet switching, configuring enterprise-class routers and switches
  • WAN Technologies: IPsec, SDWAN, inter-domain IP Routing Policy, TCP/IP, MACsec
  • Monitoring & Analysis: Splunk, Prometheus, Grafana, packet captures, debugs, syslogs, signaling traces
  • Automation & Tools: Ansible, Terraform, Docker, API Integrations, Incident Management, Problem Resolution
  • Other: DNS, TCP/UDP, LDAP, Agile Development, SDLC, Documentation, Incident Response, On-call Support, Collaboration
  • Experience working with unix systems administration and network protocols troubleshooting
  • Experience with WAN technologies/protocols like MPLS, BGP, MACsec, IPsec, SDWAN, inter-domain IP Routing Policy, and TCP/IP
  • Knowledge of Local Area Network (LAN) switching and wireless network fundamentals
  • Knowledge of wireless networking and protocols
  • 3 years of experience with MPLS, VPN, routing protocols, ethernet switching, configuring enterprise-class routers, switches, and firewalls

Accomplishments

• Global TAC Champion Award for Automation FY25, Cisco
• Stellar Automation Award, Rising Star Award, Cisco
• Innovation & Automation Award, Cisco
• Best Outgoing Student, KCG College Of Technology (Anna University)
• TrailBlazer Award, Cisco

Certification

Cisco Certified Network Professional (CCNP).

Timeline

Network Consulting Engineer II

Cisco Systems
01.2023 - Current

Network Consulting Engineer I

Cisco Systems
01.2022 - 01.2023

Full Stack Developer (Intern)

Sulekha.com
01.2021 - 01.2022

Master of Technology - Artificial Intelligence And Data Science

Indian Institute Of Information Technology

Bachelor Of Engineering - Computer Science

Anna University

Army Public School

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Shrijith Nair