Work Experience

Linux System Administrator

TUMARMS — Islamabad (On-site)

Led VoIP infrastructure and system security for enterprise-scale deployment.

  • Administered Asterisk & Vicidial VoIP systems on Ubuntu including SIP trunking and DID routing
  • Managed users, SSH access, UFW/IPTables, and server hardening with Fail2Ban
  • Configured Nginx, FTP, and NFS services for internal applications
  • Implemented SSL certificates, security best practices, and routine patching
  • Automated backups using Bash, Python, rsync, tar, and cron
  • Managed storage (LVM, partitions) and monitored system health proactively

System Administrator

Precise Tech — Remote (Canada)

Managed multi-cloud infrastructure and implemented automation for distributed systems.

  • Conducted QA testing for ERP systems validating business workflows and data accuracy
  • Managed AWS, VMware, Proxmox, and Hyper-V cloud and virtualized environments
  • Automated deployments using Ansible, Bash, and Python
  • Implemented monitoring with Zabbix and Nagios to reduce downtime
  • Enforced security practices including IAM, system hardening, and network protection