Summary
Overview
Work History
Education
Skills
Certification
Timeline
Generic

DEEPAK NADER

Senior Technical Support Engineer
Faridabad

Summary

Results-driven Network Engineer with 4+ years of experience in enterprise email hosting, VPN infrastructure, Linux-based network troubleshooting, and network security operations. Expertise in large-scale email migrations (1.5M+ accounts), Linux CLI diagnostics, Ivanti VPN management (Tier 1–4), and Palo Alto NGFW architecture. Consistent track record of zero-downtime migrations, SLA-compliant incident resolution, MFA/SAML integration, and proactive security monitoring.

Overview

3
3
Certifications
5
5
years of professional experience

Work History

Technical Support Engineer – Zoho Mail

Zoho Corporation Pvt. Ltd.
Noida
03.2024 - Current
  • Email Hosting & Migration
  • Migrated 1.5M+ email accounts, including 50K–80K VIP mailboxes, across enterprise clients with zero data loss and an average migration downtime of less than 2 hours, consistently exceeding SLA commitments.
  • Administered enterprise email infrastructure supporting IMAP, POP3, SMTP, ActiveSync, SPF, DKIM and DMARC, ensuring 99.9% service availability across multiple customer environments.
  • Performed Linux-based troubleshooting on mail servers to diagnose email delivery failures, SMTP relay issues, DNS resolution problems, mailbox synchronization failures and network connectivity issues.
  • Utilized Linux networking and diagnostic tools including tcpdump, ping, traceroute, netstat, ss, nslookup, dig, curl, telnet and SSH to isolate packet flow, DNS, routing and application connectivity problems.
  • Investigated Linux system and mail service logs using journalctl, /var/log/maillog, /var/log/messages and service logs to identify authentication failures, mail queue issues and server-side performance bottlenecks.
  • Validated SMTP, IMAP and POP3 services by testing ports, SSL/TLS connectivity and DNS records while coordinating with customer firewall, DNS and networking teams to restore production services.
  • Engineered multi-layer anti-spam and phishing protection using SPF, DKIM, DMARC and mail security policies, reducing phishing-related incidents by approximately 60%.
  • Worked as Super Administrator across 15+ enterprise organizations, managing complete migration lifecycle including planning, execution, validation, DNS cutover and customer sign-off with 100% on-time delivery.
  • Collaborated with Linux, Networking and Infrastructure teams to resolve complex production incidents involving DNS, firewall policies, SSL certificates, reverse DNS, mail routing and application connectivity.
  • Developed migration validation checklists and troubleshooting runbooks that reduced post-migration support tickets by 40% while improving first-call resolution.

Network Engineer – Ivanti VPN (Pulse Secure)

Tech Mahindra
Bengaluru
07.2022 - 03.2024
  • Resolved 40+ P1/P2 VPN incidents per month while maintaining 98% SLA compliance across Tier 1–Tier 4 enterprise support.
  • Performed end-to-end troubleshooting of VPN connectivity issues on Linux and Windows servers, validating routing tables, DNS resolution, authentication services and network reachability.
  • Used Linux utilities including tcpdump, ss, netstat, ping, traceroute, ip route, journalctl, curl and SSH to diagnose VPN tunnel failures, packet drops, routing issues and application connectivity problems.
  • Analyzed Linux system logs to identify authentication failures, certificate issues, service outages and network interruptions impacting VPN connectivity.
  • Worked with Linux-based VPN gateways and backend application servers to verify service availability, firewall accessibility and secure communication across enterprise environments.
  • Integrated MFA (Duo Security) and SAML 2.0 with Active Directory supporting enterprise environments with more than 10,000 users.
  • Configured and maintained Ivanti Secure Connect appliances across 8 global enterprise environments, achieving 99.7% platform availability.
  • Collaborated with Network, Linux, Windows, Security and Identity teams to resolve complex infrastructure issues involving certificates, DNS, Active Directory, firewall policies and routing.
  • Authored 25+ Knowledge Base articles and Root Cause Analysis documents, reducing team MTTR by 30% and improving operational efficiency.
  • Designed and implemented network solutions to enhance system performance and reliability.

Network Security Engineer – Palo Alto Networks

CSS Corp
Chennai
03.2022 - 07.2022
  • Managed Palo Alto firewall policies, NAT rules and security objects across enterprise environments while ensuring zero policy-related outages.
  • Configured GlobalProtect VPN for 200+ remote users while troubleshooting SSL VPN connectivity, routing and authentication issues.
  • Investigated firewall and connectivity issues using packet captures, tcpdump, Wireshark and Palo Alto Monitor logs.
  • Performed traffic analysis and security log investigation, identifying more than 50 security events per week and recommending policy improvements.
  • Assisted Linux and application teams in validating firewall communication, open ports and application reachability during production incidents.
  • Authored troubleshooting documentation that reduced repeat escalations by 25%.

Network Engineer – NOC & Networking

EbixCash Software Pvt. Ltd.
Faridabad
12.2021 - 03.2022
  • Monitored network devices via Whatsup Gold, generating topology diagrams for proactive fault management and enhancing network reliability.
  • Administered Cisco and Aruba switches/routers, managing VLANs (802.1Q), STP, LACP, and MPLS configurations.
  • Resolved P1–P4 incidents through multi-channel support (email, phone, Zoom), achieving SLA targets and improving response times.
  • Utilized Wireshark, tcpdump, ping, traceroute, and netstat for deep-packet inspection and fault isolation, contributing to faster issue resolution.

Education

B.Tech -

Manav Rachna International Institute of Research & Studies
Faridabad, India
05-2021

Diploma in Engineering -

Shree Ram College of Engineering & Management
Haryana
06-2018

Matriculation (10th) - undefined

D.A.V. Public School
Faridabad
01-2013

Skills

Email & Messaging: IMAP, POP3, SMTP, ActiveSync, SPF, DKIM, DMARC, Anti-Spam, Email Migration & Hosting

Linux & Diagnostics: Linux CLI Troubleshooting, tcpdump, ss, netstat, ping, traceroute, nslookup, dig, curl, telnet, SSH, journalctl, ip route, Log Analysis (/var/log/maillog, /var/log/messages)

VPN & Access: Ivanti Secure Connect, IPsec, ISAKMP, SAML 20, MFA (Duo), SSL VPN, GlobalProtect

Network Security: Palo Alto NGFW, IDS/IPS, Firewall Policy, NAT, Zero-Trust

Protocols: TCP/IP, DNS, DHCP, BGP, OSPF, VLAN (8021Q), STP, LACP, MPLS

Certification

Pulse Secure / Ivanti Technical Expert (2023–2025)

Timeline

Technical Support Engineer – Zoho Mail

Zoho Corporation Pvt. Ltd.
03.2024 - Current

Network Engineer – Ivanti VPN (Pulse Secure)

Tech Mahindra
07.2022 - 03.2024

Network Security Engineer – Palo Alto Networks

CSS Corp
03.2022 - 07.2022

Network Engineer – NOC & Networking

EbixCash Software Pvt. Ltd.
12.2021 - 03.2022

Matriculation (10th) - undefined

D.A.V. Public School

B.Tech -

Manav Rachna International Institute of Research & Studies

Diploma in Engineering -

Shree Ram College of Engineering & Management
DEEPAK NADERSenior Technical Support Engineer