NAVINKUMAR KUPPAN
Chennai
Summary
Experienced professional in networking and security, seeking a long-term position with a prestigious organization. Proven expertise in managing multiple projects simultaneously with a strong focus on accuracy. Committed to continuously enhancing technical and personal skills to contribute to the growth and success of the organization
Overview
8
8
years of professional experience
1
1
Certification
Work History
Senior Network Security Engineer
NTT DATA
04.2022 - Current
- Coordinated with third-party security information and event management (SIEM) providers to maintain protections and predict threats.
- Strengthened system security by 40% by implementing advanced encryption techniques and two-factor authentication mechanisms
- Increased network security by integrating advanced firewall and VPN management tools
- Configure, monitor, and maintain firewalls (e.g., Palo Alto, Fortinet, Check Point, Cisco FTD)
- Manage and troubleshoot VPNs (IPSec, SSL, remote access).
- Administer and support IDS/IPS systems.
- Maintain web and email security gateways (e.g. Proofpoint, Zscaler).
- Assist in enforcing network segmentation and access control policies (NAC, VLANs, ACLs).
- Maintain and audit firewall rules and ensure they follow least-privilege principles.
- Manage authentication and identity services (e.g., RADIUS, TACACS+, MFA integration).
- Perform regular health checks of the ACI fabric (spines, leaves, APICs).
- Monitor ACI fabric components, faults, logs, and events via APIC.
- Apply firmware updates and patches under supervision or per guidelines.
- Validate ACI configurations (EPGs, BD, VRFs, contracts, tenants) and creating/modifying tenants, bridge domains, EPGs, L3Out configurations, contract and filter modifications.
- Troubleshoot ACI fabric issues (e.g., endpoint learning, contracts not working, reachability).
- Act as the escalation point for L1 engineers. Engage Cisco TAC when required and follow through on support cases..
- Use tools such as APIC, NX-OS CLI, and external monitoring solutions.
- Authored security and vulnerability reports, detailing logged incursions and suggesting remediation efforts.
- Traveled to client sites to perform onsite troubleshooting and testing of Firewalls and Cisco devices.
- Optimized security configurations for routers, switches, and firewalls to improve overall system performance.
- Deployed next-generation firewalls from Fortigate and Cisco, focusing on web and application filtering, intrusion policies, and VPN migrations for site-to-site tunnels.
- Deployed centralized network security management platforms like Palo Alto Networks Panorama and Cisco Firepower Management Center (FMC), ensuring comprehensive network security oversight.
- Apply and verify configuration changes on SD-WAN edge devices and controllers.
- Assist in firmware/OS upgrades on SD-WAN appliances.
- Troubleshoot complex SD-WAN issues (connectivity, performance, policy misconfigurations).
- Handle escalation from Level 1 support.
- Work with ISPs or underlay providers for path-related issues.
Network Engineer
NTT India Pvt Ltd
10.2019 - 01.2022
- Performed troubleshooting for Juniper, Cisco, and packet analysis.
- Resolved connectivity issues for end-users through troubleshooting and implementing solutions.
- Monitoring P2P, Primary and Secondary MPLS/ILL Link in both DC and DR data centers.
- Coordinating with core team for troubleshooting the routers, Switches and firewalls.
- Communicated with vendors to resolve network outages and periods of reduced performance.
- Provided network support services for devices such as hubs, bridges, routers, and other hardware.
- Provided complete end-to-end engineering and installation of route-based IP network solutions.
- Monitored network capacity and performance to diagnose and resolve complex network problems.
- Improved network performance by troubleshooting and resolving hardware, software, and connectivity issues.
- Provided training for junior engineers in network support best practices, contributing to overall team growth and skill development.
Hardware & Network Engineer
HEAVY VEHICLES FACTORY (ITC) FROM PGN Automation Pvt Ltd
11.2017 - 10.2019
- Implemented antivirus software and conducted regular scans to protect against malware.
- Performed troubleshooting for Juniper, Cisco, and packet analysis.
- Provided network support services for devices such as hubs, bridges, routers, and other hardware.
- Assisted with implementation and support of network monitoring tools.
- Optimized PC performance through regular updates, patches, and system upgrades.
- Installed new or upgraded hardware and software and coordinated installation and follow-up with user to achieve customer satisfaction.
- Managed inventory of IT assets including hardware components and software licenses to maintain accurate records and ensure compliance with company policies.
- Removed malware, ransomware, and other threats from laptops and desktop systems.
Education
Bachelor of Engineering - Computer Science
Indira Institute of Engineering And Technology Thiruvallur
05.2014
H.S.C -
Nazareth Matriculation Higher Secondary School
05-2010
S.S.L.C -
Nazareth Matriculation Higher Secondary School
05-2008
Skills
- Cisco ACI Fabric Deployment & Administration
- APIC, Spine & Leaf Switch Configuration
- Tenants, VRFs, Bridge Domains, EPGs, Contracts & Filters
- Multi-Site & Multi-Pod ACI Architecture
- L3Out, Inter-DC & Cloud Connectivity (AWS/Azure)
- ACI Automation (Ansible, Python SDK, Terraform)
- VMware, Hyper-V, Kubernetes Integration
- Network Security (Cisco FTD, Palo Alto, Firewalls, IPS/IDS)
- Routing & Switching (BGP, OSPF, VXLAN, MPLS)
- Troubleshooting, Monitoring & Health Scores
- Zero Trust & Micro-Segmentation Strategies
Technical Profile
- Firewalls: Fortinet, Palo Alto, Cisco FMC.
- SIEM: Splunk, FortiSIEM
- Cloud: Azure, AWS, Prisma Cloud, Azure Defender
- Routing/Switching: Cisco IOS, Nexus, ISR, ASR, BGP, OSPF
- VPN & Authentication: FortiGate VPN, Cisco AnyConnect, FortiAuthenticator, Radius, LDAP, SAML
- Monitoring: Wireshark, NetFlow, SNMP tools
- ACI Fabric: Cisco APIC, EPGs, Bridge Domains, L3Outs
Course Certifications
- CCNA - Cisco Certified Network Associate 200-301, 382196308, CSCO13516021
- CompTIA Security+ Certification Training - SY0-601.
- PCNSA & PCNSE Boot Camp Training.
- Palo Alto Networks Certified Network Security Engineer(PCNSE) Certified.
- Check Point Certified Cloud Specialist -CCCS trained by Red Education.
- Cisco Black Belt and Black Belt cisco 360 certificates.
- Trend Micro Certificates (Hybrid Cloud Security, Endpoint and Email Security, Network Security).
- Data Science and Data Analysis with GenAI
Certification
- CCNA - Cisco Certified Network Associate 200-301, 382196308, CSCO13516021
- CompTIA Security+ Certification Training - SY0-601.
- Palo Alto Networks Certified Network Security Engineer (PCNSE), ID- PAN00282725
Timeline
Senior Network Security Engineer
NTT DATA
04.2022 - Current
Network Engineer
NTT India Pvt Ltd
10.2019 - 01.2022
Hardware & Network Engineer
HEAVY VEHICLES FACTORY (ITC) FROM PGN Automation Pvt Ltd
11.2017 - 10.2019
Bachelor of Engineering - Computer Science
Indira Institute of Engineering And Technology Thiruvallur
H.S.C -
Nazareth Matriculation Higher Secondary School
S.S.L.C -
Nazareth Matriculation Higher Secondary School
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