Senior Network Administrator - 3i Infotech Pvt.Ltd. - Navi-Mumbai, Maharashtra
(2026-06)
Client: National Commodity & Derivatives Exchange Limited (NCDEX), Project: Yotta DataCentre
- Managed and maintained enterprise routers, switches, and firewalls, ensuring secure, reliable, and high-performance network operations.
- Configured and supported LAN/WAN infrastructure, including routing, switching, VLANs, firewall policies, and network security.
- Monitored network performance, resolved incidents, and ensured high availability and seamless connectivity within the Yotta Data Centre environment.
- Configured and troubleshot Global Protect VPN for secure remote access for mobile and remote users
Network Security Engineer - Awdiz IT Service's LLP - Mumbai, Maharashtra
(2024-01 - 2026-05)
- Configured and maintained enterprise networks using Cisco IOS and IOS-XE, including VLANs, STP, EtherChannel, HSRP, and OSPF/EIGRP routing protocols.
- Troubleshot and resolved Layer 2/Layer 3 network issues (connectivity, routing loops, broadcast storms), maintaining >99.5% network uptime.
- Created and managed Security Policies, NAT rules, and Decryption policies to securely enable business applications. Leveraged App-ID, User-ID, and Content-ID to implement application-aware security policies, replacing traditional port-based rules.
- Monitored and analysed firewall traffic and threats using Palo Alto logs and reports, responding to security incidents.
Freelance corporate Trainer - SLOG Solutions Pvt.Ltd. - Dehradun, Uttarakhand
(2023-04 - 2023-12)
- Delivered engaging and technical training sessions on CCNA topics to groups of IT professionals and career changers.
- Instructed students on configuring and troubleshooting Cisco routers and switches in a simulated network environment. Facilitated deep-dive workshops on complex subjects like network security fundamentals (ACLs, NAT), and WAN technologies
L2 Network Engineer - nSecurities Pvt. Ltd - Burdwan, West Bengal
(2021-03 - 2023-02)
- Maintaining cisco routers and switches and Backup of IOS & Configurations & Troubleshoot.
- Configure (DHCP, IPSEC, POLICY, Routing) in pfSense firewall & L3 Switch.
- Configuration of NAT/PAT, ACL on Cisco routers and Switches.
- Troubleshoot and Configuration of VLAN, VTP, port security, port Channel in Cisco Switches.
- Configuration of Static, Dynamic (OSPF & EIGRP) and Default Routing protocols.
L2 Network Engineer - Peryto - Burdwan, West Bengal
(2021-03 - 2023-02)
- Maintaining cisco routers and switches and Backup of IOS & Configurations & Troubleshoot.
- Configure (DHCP, IPSEC, POLICY, Routing) in pfSense firewall & L3 Switch.
- Configuration of NAT/PAT, ACL on Cisco routers and Switches.
- Troubleshoot and Configuration of VLAN, VTP, port security, port Channel in Cisco Switches.
- Configuration of Static, Dynamic (OSPF & EIGRP) and Default Routing protocols.
NOC Support Engineer - LalaniInfotech Ltd - Kolkata, West Bengal
(2017-11 - 2020-04)
- Monitor network devices, servers, firewalls, and critical services using NOC monitoring tools (SolarWinds, PRTG, Zabbix, etc.).
- Perform L1/L2 support, troubleshoot network issues, and escalate unresolved incidents to higher teams.
- Analyze alerts, alarms, and performance logs to identify network outages or degradation.
- Manage incidents, service requests, and problem tickets within SLA timelines.
- Perform basic configuration and troubleshooting of routers, switches, firewalls, and load balancers.
- Handle ISP coordination for internet links, circuit issues, downtime, and latency problems.
- Conduct remote troubleshooting via SSH, RDP, Telnet, and console sessions.
- Support WAN, LAN, VPN, DNS, DHCP, NAT, and routing issues.
- Maintain documentation of network events, incident reports, SOPs, and daily operational logs.
- Perform scheduled maintenance tasks, patch updates, and health checks on systems.
