Soubhik Biswas
Network Security Specialist
Kanchrapara,WB
Summary
3 years of rich experience in security as a Network Security Specialist. Determined to excel in Network Security, Cybersecurity and evolving technologies.
Overview
3
3
years of professional experience
6
6
Certifications
3
3
Languages
Work History
Network Security Specialist (NSS1)
TechSharingb Pvt Ltd
08.2023 - Current
- 1. Strong understanding of OSI and TCP/IP models, networking fundamentals, and IP addressing/subnetting.
- 2. Hands-on experience with configuring Cisco routers and switches, including VLANs, trunking, and inter-VLAN routing.
- 3. Skilled in routing protocols such as OSPF, EIGRP, and static routing.
- 4. Knowledge of NAT, PAT, ACLs, and traffic filtering for secure network access.
- 5. Experience in configuring DHCP, DNS, and basic network services on Cisco devices.
- 6. Proficient in troubleshooting Layer 2 and Layer 3 connectivity issues using Cisco CLI tools (ping, traceroute, show commands).
- 7. Familiar with STP, RSTP, EtherChannel, and other LAN switching technologies.
- 8. Understanding of WAN technologies, including PPP, Frame Relay fundamentals, and VPN basics.
- 9. Knowledge of IPv4 and IPv6 addressing, subnet planning, and implementation.
- 10. Familiar with network security basics, including device hardening and port security.
- 11. Ability to manage and maintain Cisco IOS devices, perform backups, restores, and upgrade firmware.
- 12. Experienced with Packet Tracer, GNS3, or CML for network simulation and lab practice.
- 13. Involved in implementing ASA, WSA, SMA and Threatgrid.
- 14. Migrate access policies from BlueCoat Web Proxy to Cisco WSA.
- 15. Integration between WSA, SMA and Cisco Threatgrid.
- 16. Troubleshoot any errors that occur on the client side.
- 17. Add a new access policy as per the CR request.
- 18. Document the newly created access policy.
- 19. Take backups for all appliances.
- 20. Hands-on experience in configuring and managing Cisco Secure Network Analytics (Stealthwatch) for network visibility and threat detection.
- 21. Performed SPAN, NetFlow, and telemetry configuration on network devices to integrate with SNA.
- 22. Monitored network traffic and identified anomalies, suspicious behaviours, and policy violations using SNA dashboards and alerts.
- 23. Troubleshoot flow collection issues and optimised FlowCollector, FlowSensor, SMC, FS, and DS components for PoC environments.
- 24. Assisted in PoC setups by deploying and managing virtual appliances for Stealthwatch components.
- 25. Generated detailed security and network behaviour reports to support incident response activities.
- 26. Worked with Cisco Firepower Threat Defense (FTD) for firewall and intrusion prevention system (IPS) functionalities.
- 27. Configured and managed Access Control Policies (ACP), Security Intelligence, and NAT policies in FMC.
- 28. Conducted regular policy optimisation, rule reviews, and troubleshooting of traffic flow issues.
- 29. Experience in deploying FTD updates, health monitoring, and managing FMC configurations.
- 30. Investigated security events and intrusion alerts using Firepower FMC dashboards.
- 31. Performed VPN configuration, basic routing, and network segmentation using Firepower features.
Network Security Engineer
BITVUE NETWORKS PRIVATE LIMITED
02.2023 - 07.2023
- 1. Checking networking connectivity and troubleshooting.
- 2. Support in Web Proxy implementation.
- 3. The logs generated by WSA reporting are adequately maintained.
- 4. If any issues related to WSA SMA arise, troubleshoot them promptly to resolve them.
- 5. Perform network maintenance and system upgrades, including service packs and security configurations.
- 6. To troubleshoot equipment and network problems, participate in critical maintenance windows, and open and track TAC cases through to problem resolution on pre- and post-production issues.
- 7. Select and implement security tools, policies, and procedures with the company’s security team.
Education
PG Diploma - Cyber Security and Ethical Hacking
Intellipaat
Bangalore01.2022
CCNP Security -
Network Bulls
Gurugram, Delhi01.2019
BCA - undefined
Maulana Abul Kalam Azad University of Technology
01.2018
12th - undefined
West Bengal Council of Higher Secondary Education
01.2015
Skills
1 Cisco WSA - Expert
Certification
Black Belt – Network Security - Cisco
Affiliations
- IIT Bombay Java Training
- Sep,2017 – Nov 2017
ONGOING TECHNOLOGY UPSKILL
- 1. Cisco ISE
- 2. Cisco Umbrella
- 3. Cisco Secure Endpoint
Disclaimer
I acknowledge that all of the information provided above is true to the best of my knowledge. Soubhik Biswas
Timeline
Network Security Specialist (NSS1)
TechSharingb Pvt Ltd
08.2023 - Current
Network Security Engineer
BITVUE NETWORKS PRIVATE LIMITED
02.2023 - 07.2023
BCA - undefined
Maulana Abul Kalam Azad University of Technology
12th - undefined
West Bengal Council of Higher Secondary Education
PG Diploma - Cyber Security and Ethical Hacking
Intellipaat
CCNP Security -
Network Bulls