Summary
Overview
Work History
Education
Skills
Certification
Security Skills
Technical Skills
Disclaimer
Personal Information
Timeline
Generic

VIGNESH R

Summary

Dynamic and results-oriented Network Security Engineer with over 9 years of hands-on experience in managing enterprise-grade firewalls, VPNs, load balancers, cloud environments, and network infrastructure. Proven expertise in Check Point, Palo Alto, Cisco ASA, F5 (LTM, ASM), and AWS/Azure/OCI. Strong background in incident response, vulnerability remediation, UAT setup, patch management, and automation of routine infrastructure tasks. Adept at cross-functional collaboration, technical mentoring, and driving secure, scalable network operations.

Overview

9
9
years of professional experience
2015
2015
years of post-secondary education
5
5
Certifications
2
2
Languages

Work History

Infrastructure Engineer

NCS Pte Ltd
03.2025 - Current
  • Manage and maintain Access switches, core switches, routers, firewalls, and load balancers in multiple data centers, ensuring seamless network operations and data integrity.
  • Built a dedicated UAT environment for Check Point firewall, enabling the team to simulate changes, test configurations, and minimize risk during production deployments.
  • Perform routine firmware and software upgrades for critical infrastructure including Check Point, Palo Alto, F5 load balancers, and Cisco switches, ensuring compliance and stability.
  • Manage and maintain F5 LTM & ASM, including virtual server configuration, iRules, health checks, and web application firewall (WAF) policies.
  • Address vulnerability assessment (VA) findings from ISTO by applying security hardening: updated SSL certificates, disabled weak TLS/SSL ciphers, and enforced secure protocols.
  • Administer Bluecoat ProxySG, handling policy adjustments, user authentication issues, and SSL interception configuration.
  • Manage ClearPass Policy Manager (CPPM) and Cisco ISE for 802.1X, RADIUS/TACACS+ authentication, and network access control across wired and wireless environments.
  • Support enterprise switching infrastructure with Cisco Nexus, Catalyst, and Alcatel Omni Switches, handling L2/L3 issues, VLANs, STP, and EtherChannel.
  • Oversee AWS networking components like VPCs, Security Groups, VPNs, and routing tables to support hybrid cloud infrastructure.
  • Use Wireshark, SolarWinds, CLI, and syslog systems for proactive monitoring, packet capture, and deep-dive troubleshooting.
  • Manage and patch Windows Server 2019 systems hosting AirWatch (VMware Workspace ONE) environments.
  • Administer iPad device lifecycle via AirWatch console, including enrollment, compliance management, patching, and application deployment.
  • Handle procurement (PO), asset disposal, and client-facing presentations for iPad devices used across the organization.

Network/Cloud Security Specialist

Lenovo PCCW Solutions
05.2023 - 03.2025


  • Provide L3 support for Check Point, Palo Alto, and Cisco ASA firewalls, handling advanced troubleshooting, VPNs, NAT policies, and HA configurations.
  • Built a dedicated UAT environment for Check Point firewall, enabling the team to simulate changes, test configurations, and minimize risk during production deployments.
  • Perform routine firmware and software upgrades for critical infrastructure including Check Point, Palo Alto, F5 load balancers, and Cisco switches, ensuring compliance and stability.
  • Manage and maintain F5 LTM & ASM, including virtual server configuration, iRules, health checks, and web application firewall (WAF) policies.
  • Address vulnerability assessment (VA) findings from ISTO by applying security hardening: updated SSL certificates, disabled weak TLS/SSL ciphers, and enforced secure protocols.
  • Proactively monitoring and respond to incidents related to network devices, promptly resolving issues to minimize downtime and maintain high availability.
  • Implemented and maintained robust network security measures to safeguard data and systems against cyber threats, ensuring compliance with industry best practices and company policies.
  • Conducted regular configurations and optimizations on network devices to enhance performance, security, and scalability, resulting in improved overall network efficiency.
  • Led and coordinated regular device upgrades, ensuring that all network equipment was up to date with the latest firmware and security patches.
  • Provided expert-level support for ClearPass Policy Manager (CPPM) Network Access Control (NAC) system, effectively resolving incidents, and fulfilling service requests related to access control and network authentication.
  • Documented network configurations, procedures, and troubleshooting guidelines to facilitate knowledge sharing and smooth onboarding of new team members.
  • Conducted periodic network assessments and audits to maintain a secure network infrastructure.
  • Collaborated with vendors and service providers to evaluate and procure network hardware and software, ensuring cost-effective solutions that met the organization's requirements.
  • Actively participated in cross-departmental meetings and projects to align network security strategies with broader organizational objectives and initiatives.

Senior Network Analyst

Oracle India Pvt Ltd
07.2021 - 05.2023
  • Company Overview: Bangalore
  • Configuring and troubleshooting all network related issues in OCI (oracle cloud) which includes VPN Creation, FC Creation, LPG and RPC Creation.
  • Taking care of user creation, IAM policy addition, routing and White listing Security flows in OCI (oracle cloud) both via Sec-list and NSG (Network Security Groups).
  • Handling Service Request, Incidents, problem tickets and RFC (Request for change) Tickets.
  • Handling P1 Outage calls to resolve the ongoing issues on live troubleshooting.
  • Handling schedules calls to understand the customer requirements for new provisioning and troubleshooting.
  • Taking care of SSL certificate renewals in weekly and monthly basis.
  • Working with F5 Silver line team to resolve the WAF related issues.
  • Creating Virtual servers, Profiles, irules, Weak Cipher Management, SSL Management in F5 and Upgrading the F5 devices.
  • Create and managing DNS entries for the VS which we create in F5.
  • Migrating customers from Legacy to OCI (Oracle Cloud).
  • Taking care of LTM, GTM, ASM modules in F5 Load balancers.
  • Building VPN tunnels between Legacy firewall to Cloud, Hybrid Cloud (Between OCI and Azure), and Legacy firewalls to OnPrem Customers.
  • Opening flows based on the customer request in Firewalls (Junos, Net screen, Checkpoint & Palo Alto).
  • Opening ingress and egress security flows in OCI.
  • Configuring VPN tunnels in OCI cloud.
  • Configuring and troubleshooting all network related issues in legacy devices ( Junos firewall, Net Screen firewall, Checkpoint firewall, Palo Alto firewall, F5 Load Balancer, Switches and Routers).
  • Decommissioning the network devices once the entire Customer from the DC is migrated to cloud successfully.
  • Handling the RMA activities during the Device Failure.
  • Taking care of SIEM Offences and Monitoring the Network Devices via Enterprise Monitoring and thousand eyes tools.
  • Mentoring new joiners and let them work independently without any dependency by preparing providing all the KT documents to them.
  • Bangalore

Security Specialist (L3)

IBM India Pvt Ltd
01.2020 - 07.2021
  • Company Overview: Chennai
  • Working as a L3 Security specialist to take care of all the Devices in Data Center (Checkpoint firewall, Palo Alto firewall, F5 Load balancers, Bluecoat Proxy, Cisco ISE).
  • Users will raise their problems as Incidents, Service Request, and Change request. As a L3 Security team, we need to get in touch with users to understand their requirements and implement their request.
  • Upgrade the Firewalls, Proxy, Load balancers, ISE, etc. based on the business requirements and approvals from customer.
  • Allowing flows based on the user request in Firewalls (Checkpoint& Palo Alto), Proxy.
  • Building VPN tunnels between DC to sites to secure the traffic between them.
  • Performing Packet captures during live troubleshoot to find out packet level issues.
  • Creating Virtual servers in F5 and perform load balancing for Servers based on the requirements from customers.
  • Create and managing DNS entries for the VS which we create in F5.
  • Working as a Primary SPOC for SDWAN migration project to migrate the existing infrastructure from MPLS to SDWAN or VPN to SDWAN to minimize the management cost of existing infra as well as boost the performance of available links.
  • Working as a primary SPOC to manage all the security advisories raised in RCP (Risk based continuous patching) and propose solution to customer which will mitigate the Vulnerability and follow up till the close of advisories.
  • Attending P1 incident calls regularly to resolve the ongoing issues on live troubleshooting.
  • Taking care of on boarding the new devices into production.
  • Maintaining Weekly backup for all the devices which we manage.
  • Attending regular CAB meeting to present the list of changes which we are performing daily to get the approvals.
  • Mentoring new joiners and let them work independently without any dependency by preparing providing all the KT documents to them.
  • Chennai

Network and Security Engineer

NTT Data Global Delivery Services
03.2019 - 12.2019
  • Company Overview: Chennai
  • Configuring and troubleshooting various Network Devices and Generating trouble tickets.
  • Upgrading firewalls based on the business requirement.
  • Doing MAC Bypass in Cisco ISE based on the requirement.
  • Doing all kind of changes based on the business requirement in Checkpoint, Palo Alto and NSX firewalls.
  • Configuring, Troubleshooting and upgrading Nexus, Catalyst switches and routers.
  • Adding nodes, changing polling engines, Reserving IP in Solar Winds as a admin.
  • Providing On-Demand access for users & troubleshooting RSA related issues in RSA security console.
  • Handling P1 calls and troubleshooting the issues within SLA.
  • Providing On call support for the project in weekends.
  • VPN tunnel configuration and troubleshooting.
  • Sending Daily backup reports to the teams.
  • Attending Weekly CAB meeting to discuss about the weekend change activity plans.
  • Implementing all the changes raised for the week in Sunday maintenance window.
  • Providing KT to the new joiners.
  • Attending weekly meeting with Onsite SME to discuss about the challenges in projects and making resolution for the same.
  • Chennai

Network Engineer

Claritaz Techlabs LLP
11.2018 - 03.2019
  • Company Overview: Chennai
  • Monitoring various types of Network Devices and Generating trouble tickets.
  • 100% RFO update for minor, major, critical cases by continuous follow up with concern team.
  • Monitoring IPSec Tunnels with the help of SPLUNK and Network Devices (Switch, Routers, ASA firewall, Checkpoint firewall, F5 Load Balancers) using Solar winds.
  • Monitoring and troubleshooting high transmit/receive utilization alarms.
  • Hands-on experience in FMC (Cisco firepower).
  • We will be doing packet capture, checking and applying the firewall rules in Firepower.
  • Doing firewall push every week for both Cisco ASA and Checkpoint firewalls.
  • Analyzing and troubleshooting network performance issues.
  • Configuring ACL in firewalls for providing access to the users as per their request.
  • Configuring GRE / IPSEC VPN tunnels in routers and firewalls for secure communication.
  • Configuring Context in Cisco ASA firewalls as per the business requirements.
  • Chennai

Network Engineer

Tata Communications Transformation Services Ltd
01.2016 - 11.2018
  • Configuring & Implementation of customers network infrastructure (LAN/WAN) with Routers, Switches.
  • Configuring the Transmission Network at Access and Core Network for IP & Ethernet based products i.e. Ethernet circuits, IP VPN circuits (MSP Platform) over MPLS network.
  • It consists of installation plan and configuration of transmission equipment and routers such as MSPP & MSP transmission equipment and Cisco routers AGN- ASR 901 & ASR 903 and Alcatel switches and routers.
  • Routing related tasks includes providing Cisco router configuration and change management, providing technical support for Cisco Router configurations and installation for Customer.
  • Switching related tasks includes implementing and setting up VLANS and configuring .1Q on Fast-Ethernet channel between switches.
  • Interconnection customer branch offices with the help of VRF, VPN and MPLS platform.

Education

B. Tech - Electronics & Communication Engineering

MVIT Engineering College

Skills

Firewalls

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Certification

Cisco Certified Network Associate – Routing and Switching, CCNA Certified, 2019

Security Skills

Check Point R81.20, Palo Alto, Cisco ASA, Cisco AnyConnect, IPsec, SSL VPN, F5 LTM, ASM (WAF), iRules, Bluecoat ProxySG, AWS (VPC, EC2, Security Groups, VPN, Routing), Cisco Nexus, Catalyst, Alcatel Omni Switch, Aruba ClearPass (CPPM), 802.1X, RADIUS, TACACS+, BGP, OSPF, STP, VLAN, NAT, SNMP, Wireshark, SolarWinds, Putty

Technical Skills

CP23800, 15000, 12000, 5000, 4400, 3000 series, PA-5250, PA-3250, VIPRION 2150, BT-4000S, i2000, i4000, ProxySG, 3650, 3850, 6807-XL Switches, OS6860E, OS6900-X72, OS6900-T20, OS6900-T40

Disclaimer

I hereby declare that the above written are true to the best of my knowledge and belief.

Personal Information

  • Passport Number: R0243427
  • Date of Birth: 07/15/93
  • Gender: Male
  • Nationality: Indian
  • Marital Status: Single

Timeline

Infrastructure Engineer

NCS Pte Ltd
03.2025 - Current

Network/Cloud Security Specialist

Lenovo PCCW Solutions
05.2023 - 03.2025

Senior Network Analyst

Oracle India Pvt Ltd
07.2021 - 05.2023

Security Specialist (L3)

IBM India Pvt Ltd
01.2020 - 07.2021

Network and Security Engineer

NTT Data Global Delivery Services
03.2019 - 12.2019

Network Engineer

Claritaz Techlabs LLP
11.2018 - 03.2019

Network Engineer

Tata Communications Transformation Services Ltd
01.2016 - 11.2018

B. Tech - Electronics & Communication Engineering

MVIT Engineering College

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