Open to opportunities

Thirmalai kumar

@thirmalaikumar

Message

Network architect and security lead specializing in SD-WAN and cloud networking.

India

Message

What I'm looking for

I seek senior network and security roles where I can design resilient cloud-hybrid networks, lead SD-WAN and automation initiatives, mentor teams, and deliver secure, high-availability infrastructure at enterprise scale.

I am a Network Infrastructure Specialist with 12+ years of global experience architecting, securing, and operating complex enterprise networks across data centers, branches, and hybrid cloud platforms (AWS, Azure, OCI). I deliver high-availability designs, SD-WAN rollouts, cloud connectivity, and VoIP collaboration solutions using Cisco, Juniper, Palo Alto, Fortinet, VMware, and Microsoft technologies.

I have led SD-WAN deployments, Zero Trust integrations, migrations to cloud with ALB/WAF, and large-scale network integrations for acquisitions and new offices; I also manage vendor procurement, BOQs/POs, and compliance activities. I mentor and lead teams of network administrators and IT engineers while driving incident/change management, monitoring, and proactive remediation.

I focus on automation and repeatable operations using Python, Ansible, Terraform, and REST APIs, and I hold multiple cloud, security, and networking certifications including CCNP Enterprise, Fortinet, Oracle Cloud, AWS Cloud Practitioner, and VMware credentials.

Experience

Work history, roles, and key accomplishments

Current

Senior Network and VOIP consultant

Current

Algihaz Holdings

Sep 2024 - Present (1 year 1 month)

Designed and implemented enterprise networks, FortiGate SD-WAN, Zero Trust access, OCI/AWS networking, and high-availability collaboration solutions while leading migrations, vendor procurement, and compliance activities.

Senior Network Engineer

ICU Medical India

Oct 2020 - Jun 2024 (3 years 8 months)

Deployed and supported global enterprise networks using Cisco Meraki, Nexus/Catalyst, and Palo Alto firewalls, delivering SD-WAN migrations, VPN solutions, and network automation to ensure SLA compliance and minimize downtime.

Cisco Meraki Palo Alto Networks SD WAN Nexus Catalyst VPN Firewalls Automation Troubleshooting

Network Manager

NFuture Digital India

Jun 2016 - Feb 2020 (3 years 8 months)

Managed data center and retail network infrastructure across South India, achieving 90%+ uptime through MPLS/IPSec/GRE VPNs, BGP/OSPF/MPLS optimizations, vendor management, and site rollouts.

MPLS BGP OSPF Cisco ASR Nexus VPN Vendor Management High Availability

Sr. IT Ops Specialist

Intuit Technologies

Nov 2009 - Mar 2016 (6 years 4 months)

Served as SME for data center and network infrastructure, leading incident resolution, SDN/ACI implementations, and migrations to active/passive and cloud data centers.

Cisco ACI Juniper SRX Incident Management Troubleshooting

Senior Network Administrator

3i Infotech

Feb 2009 - Mar 2009 (1 month)

Managed enterprise connectivity for National Informatics Centre projects, troubleshooting BGP/OSPF/MPLS/VPN links and coordinating multi-district network provisioning with major carriers.

BGP OSPF MPLS VPN Carrier Coordination