Gagan Bymana Arun

Junior Network Security & TAC Engineer

Bengaluru, Karnataka, India 3+ yrs exp 87 · Excellent

About

Network security and technical support professional with 2+ years of combined experience in enterprise IT support and FortiGate-focused security operations. Hands-on experience with firewall policies, IPsec and SSL VPN, NAT, authentication, packet capture, incident triage, and technical escalation. MSc Cyber Security graduate with Distinction, backed by Fortinet and Microsoft Azure certifications and a current FortiGate home lab.

Skills & Expertise (38)

FortiGate Advanced

8.0/10

Years Exp

IPsec VPN Intermediate

7.5/10

Years Exp

Ssl vpn Intermediate

7.5/10

Years Exp

WIRESHARK Intermediate

7.0/10

Years Exp

Packet Capture Intermediate

7.0/10

Years Exp

incident triage Intermediate

6.5/10

Years Exp

RCA Intermediate

6.5/10

Years Exp

DHCP Intermediate

6.0/10

Years Exp

DNS Intermediate

6.0/10

Years Exp

VLAN Intermediate

6.0/10

Years Exp

TCP Intermediate

6.0/10

Years Exp

Active Directory Intermediate

6.0/10

Years Exp

Linux CLI Intermediate

6.0/10

Years Exp

SAML FSSO OSPF BGP Microsoft 365 ZTNA SNMP Static routing Windows Server Azure Fundamentals Postman Technical Documentation SD-WAN HA GPO RBAC LDAP ARP IP ServiceNow 2FA SSL Inspection Web Filtering PAT FortiOS

Work Experience

Warehouse Operative (Technical Support Responsibilities)

Gap Personnel assignment at Matalan

Feb 2025 - May 2026

Provided technical support for warehouse operations across departments including Box Pick, Singles, Goods In, and Dispatch. Supported and maintained handheld RF scanner devices used by warehouse staff for inventory tracking, order picking, and dispatch management across shift targets. Troubleshot device connectivity, WMS application issues, and network access problems to minimize operational downtime across warehouse departments. Managed incident tickets via ServiceNow, ensuring timely resolution and SLA-compliant follow-up for warehouse-critical systems.

Cybersecurity Developer

Skill Cube Private Ltd. (Capgemini client delivery)

Oct 2022 - Jun 2023

Provided L1 technical support for firewall and connectivity incidents through phone, email, and chat, documenting case progress and next actions. Configured and troubleshot FortiGate security policies, SNAT/DNAT/PAT, web filtering, SSL inspection, traffic shaping, and two-factor authentication. Investigated site-to-site IPsec VPN incidents, including IKEv1/IKEv2 Phase 1 and Phase 2 failures, tunnel drops, and connectivity issues. Used FortiGate diagnostics, packet captures, and Wireshark to isolate network slowness, packet loss, and session-level problems. Assisted with HA, SSL VPN, SNMP, LDAP, FSSO, and SAML configurations while developing working knowledge of SD-WAN, BGP, OSPF, and ZTNA. Reproduced customer issues in a lab and escalated complex cases to vendor teams with debug output, packet captures, and clear technical notes.

System Engineer

Infosys Limited

Mar 2021 - Jul 2022

Resolved L1 support tickets covering Microsoft 365, Active Directory, Windows access, and basic network connectivity while following SLA and escalation procedures. Supported user account provisioning, password resets, access changes, group membership, and policy checks using AD, LDAP, RBAC, and GPO concepts. Performed first-line DNS, DHCP, VPN, and endpoint connectivity checks and escalated unresolved faults with relevant diagnostic information. Maintained SOPs and troubleshooting guides so recurring support issues could be handled consistently across the service desk.