Adi S.

System Administrator | System Engineer | Hosting Server Linux Expert

I am a Senior System Administrator & Site Reliability Engineer in Hosting Server Industry with over 10 years of professional experience managing, securing, and optimizing large-scale hosting and cloud infrastructures. Throughout my career, I have been directly hands-on for 5,000+ Linux & windows servers across multi-datacenter environments, spanning both traditional hosting platforms and modern virtualization/cloud ecosystems. What I Do Best * Linux Server Administration (RHEL, AlmaLinux, Rocky, CloudLinux, Ubuntu, Debian) * Hosting Stack: cPanel, DirectAdmin, Plesk (Linux & Windows Server) * Virtualization: Proxmox, Virtualizor, Virtuozzo HCI, SolusVM, OnApp, VMware * Automation & DevOps: Ansible, GitLab CI/CD, PXE, AWX * Mail Servers: Exim, Postfix, SmarterMail * Web Servers: Apache, Nginx, Litespeed * Backup Systems: JetBackup, Acronis, R1Soft, PBS * Monitoring: Prometheus, Grafana, LibreNMS, New Relic * Server Performance Optimization & Hardening * Incident Response & Production Troubleshooting High-Impact Projects I Delivered * Built full Linux monitoring infrastructure (CheckMK, Prometheus ecosystem) * Designed & deployed VPN and access security system using AlmaLinux * Automated server provisioning with Ansible + GitLab pipelines * Developed automation systems for hosting provisioning (PXE + GitLab) * Built DCIM & internal asset management *Created internal password-sharing & access policy systems Leadership Experience * Led data center migration operations * Built Proxmox-based & Virtualizor VPS infrastructure for enterprise workloads * Successfully launched new hosting & VPS products (multi-million IDR revenue monthly) * Managed cross-functional teams (engineering, developers, business) If you need a high-level SRE, Linux administrator, or hosting expert who can solve critical issues, stabilize infrastructure, optimize performance, and automate systems — I can help you.