OM SHANKAR CHAUDHARY

IT Systems Engineer | Systems Administrator | VoIP Engineer | Infrastructure Specialist
Auckland, New Zealand
+64 27 540 1665
oschaudhary19@gmail.com
linkedin.com/in/oschaudhary
omshankar.wordpress.com
Work Rights
NZ Student Visa
Up to 25 hrs/week during study
Full-time during permitted scheduled breaks
IT Infrastructure professional with 13+ years of hands-on experience in designing, deploying, and managing enterprise systems across Linux, Windows, VoIP, virtualization, and networks. Experienced in server infrastructure, Vicidial/Asterisk, enterprise telephony, monitoring, backup and infrastructure migrations supporting 500+ agent environments. I am currently pursuing a Master of IT at Auckland Institute of Studies. Seeking Systems Engineer, Systems Administrator, Infrastructure Engineer, or VoIP Engineer roles in Auckland.

Technical Skills

OS: Linux (CentOS, Ubuntu, Debian, RHEL), Windows Server (2008-2016), Windows (XP-11)
Virtualization: Citrix XenServer, VirtualBox, P2V Migrations
VoIP: Asterisk, Vicidial, GOautodial, SIP Trunking, IVR, FOP2, Grandstream, AudioCodes
VoIP Hardware: Yealink, Polycom, Digium, Snom, Linksys ATA, Cisco SPA, Obihai, Dinstar GSM
Microsoft: Active Directory, GPO, OU Design, DNS, DHCP, Drive Mapping
Networking: LAN/WAN, Routers/Switches, PfSense, Endian, IPFire
Monitoring: Nagios, FAN, Cacti, Spiceworks, DameWare, Snipe-IT, Uchiwa monitoring
Storage/Backup: FreeNAS, Synology NAS, rsync, scp, tar, gzip, FOG Imaging, Clonezilla
Communication & Messaging: Zimbra, Rocket.Chat, Openfire, UCS (Univention Corporate Server)
Hardware: HP ProLiant (DL560 G8, 380 G7), IBM x3630 M4, Dell PowerEdge (R730, R740, R640, R6715)
AI Tools: Applied LLMs to accelerate scripting, UI design and resolve VoIP/SIP configurations.

Professional Experience

Deputy Manager, IT

Concentrix Daksh Services India Pvt Ltd - Kolkata, India
January 2021 - Present
  • Lead IT infrastructure for multi-site BPO supporting 500+ agents across inbound/outbound operations.
  • Architect Asterisk-based VoIP (Vicidial) handling 10,000+ daily calls at 99.5% uptime.
  • Administered Uchiwa monitoring and alerting.
  • Design backup strategies using rsync, tar and scp across 100+ servers.
  • Supervise 4 IT technicians; create SOPs and conduct technical training.
  • Design and configure IVRs as per requirements.
  • Administered CounterPath Stretto Platform for Bria softphone clients.
Key Achievement: Reduced VoIP call drop rate from 8% to 0.5% via SIP trunk optimization and codec tuning.

Computer Network and Systems Engineer

Teleminds Infotech Pvt. Ltd - Kolkata, India
August 2018 - July 2020
  • Team Lead: designed and deployed complete IT infrastructure for 300+ seat call centre in Delhi.
  • Built Linux-centric environment: 300+ Ubuntu workstations, NAS, PfSense firewall, Asterisk PBX, UCS domain controller.
  • Configured AudioCodes VoIP gateway for PSTN integration; SIP trunking across 3 carriers for redundancy.
  • Deployed FOG Imaging Server; reduced new workstation setup from 4 hours to 30 minutes.
  • Manage Citrix XenServer cluster with 50+ VMs, including P2V migrations, resource allocation and disaster recovery.
  • Manage Synology NAS and FreeNAS for call recordings, documents and VM backups.
  • Led office relocation: migrated 300+ systems, 20+ servers and network infrastructure with negligible downtime.
  • Administered Zimbra Mail Server for 300+ users with automated backups and spam filtering.
Key Achievement: Delivered Delhi call centre setup 2 weeks ahead of schedule, enabling early client launch.

Principal Executive - Telephony & Networks

Home Credit India Finance Pvt. Ltd - Gurugram, India
February 2018 - August 2018
  • Managed enterprise telephony for 1,000+ employee financial services company.
  • Administered Asterisk PBX with custom IVR flows and call recording.
  • Configured VoIP endpoints including Yealink, Polycom and Digium across 2 office locations.
  • Troubleshot complex VoIP issues using Asterisk logs and packet analysis; maintained 99.8% call quality.

Computer Network and Systems Engineer

Teleminds Infotech Pvt. Ltd - Kolkata, India
August 2015 - February 2018
  • Built and maintained Windows Server 2008 environment with AD, DNS and GPO for 300+ users.
  • Deployed Vicidial call centre platform with reporting, agent monitoring and campaign management.
  • Configured routers, switches, VLANs and WAN links across 2 office locations.
  • Implemented Snipe-IT asset management; tracked 1000+ assets with barcode scanning.
  • Deployed Rocket.Chat and Openfire internal chat servers for team collaboration.
  • Integrated biometric attendance systems with network infrastructure.

Computer Network and Systems Engineer

ChoiceForce Infotech Pvt. Ltd - Kolkata, India
January 2013 - July 2015
  • Managed mixed Linux/Windows environment for 200+ agent call centre operation.
  • Administered Asterisk and Vicidial platforms; configured campaigns, auto-dialers and IVRs.
  • Maintained network security via PfSense firewall with VPN, intrusion detection and traffic shaping.
  • Developed Bash scripts for automated log rotation, backup verification and archiving call recordings.

System Administrator

Telesynergy Marketing Pvt. Ltd - Kolkata, India
July 2012 - December 2012
  • Administered Windows workstations and thin clients, file sharing and print services for 80+ users.
  • Managed desktop support tickets; 95% first-call resolution rate.
  • Configured network printers, scanners and VoIP phones for new office setup.

Network Administrator

Nepal Pharmaceuticals Lab Pvt. Ltd - Nepal
July 2011 - July 2012
  • Designed and implemented LAN infrastructure for pharmaceutical manufacturing facility.
  • Managed Windows XP/7 workstations, network switches and internet connectivity.

Education

Master of Information Technology (In Progress) - Auckland Institute of Studies (AIS), Auckland, NZ
Expected Completion: 17th Dec 2027
Bachelor of Engineering (Computer Science) - Khwopa Engineering College, Purbanchal University, Nepal
2006 - 2011

Certifications

Certification Provider Year
Digium Certified Asterisk Administrator (dCAA) Digium/Sangoma 2017
Cisco Certified Network Associate (CCNA) Cisco 2012
VMware VCA - Data Center Virtualization VMware 2013
VMware VCA - Cloud VMware 2013
VMware VCA - Workforce Mobility VMware 2013
Currently learning: Building modern websites using AI tools and integrating LLMs, Retrieval-Augmented Generation (RAG) based features, and AI chatbots.

Key Projects

Enterprise Call Centre IT Infrastructure Setup - Delhi, India | Team Lead | Teleminds Infotech

End-to-end deployment of 300+ seat call centre. Stack: Debian, Citrix XenServer, PfSense, Asterisk PBX, AudioCodes gateway, UCS and Synology NAS. Delivered 2 weeks ahead of schedule with full documentation.

Office Relocation & Server Migration - Kolkata, India | Lead Engineer | Teleminds Infotech

Migrated 300+ workstations, 8 physical servers and network infrastructure with near-zero downtime over a single weekend, ensuring seamless business continuity.

Achievements

Reduced VoIP call drop rate from 8% to 1% via SIP trunk routing optimization, capacity tuning and failover configuration.
Achieved 99.9% server uptime across 3 years through proactive monitoring.
Cut workstation deployment time from 4 hours to 30 minutes via FOG automation.
Maintained 99.5% call platform uptime handling 10,000+ daily calls across multi-site operations.
Migrated 500+ systems with near-zero business downtime during office relocation.

Additional Information

Driver's License: Nepal (Motorcycle); India (Motorcycle + Car) - NZ license conversion in progress.
Availability: Immediate for part-time roles; full-time from Jan 2027 (post-graduation).
Location: Auckland, NZ | Open to roles across the Auckland region.
Languages: English (fluent), Hindi (fluent), Nepali (native)