Skills

System Administration

• Windows Server and network services
• Active Directory (administration, design, security)
• Microsoft SQL Server
• Linux server administration and network services
• LAMP (Linux, Apache, MySQL, PHP) and LEMP (Linux, Nginx, MariaDB, Python/PHP) stacks
• Zabbix, Nginx, Apache, MariaDB, ISC BIND, ISC Kea, OpenLDAP, Open-AudIT, OpenProject, Nextcloud
• Python, venv, Django, Gunicorn
• IoT solutions
• Local AI infrastructure: Ollama, Whisper (speech-to-text)
• Local LLM models: Qwen 14B, Qwen 32B
• Claude Code, OpenAI (AI-assisted development tools)

Virtualization

• Proxmox VE Cluster management (HA, node management)
• KVM-based virtualization and cluster management
• VMware vCenter Cluster (HA, DRS)
• Microsoft Hyper-V Cluster
• Ceph Cluster — distributed storage (OSDs, pools, CRUSH rules)
• Virtualization platform migration: VMware ESXi → Proxmox, XenServer → Proxmox (KVM)
• Physical server platforms: HPE, IBM, Fujitsu, Dell, Supermicro

Storage & Backup

• TrueNAS, OpenMediaVault, OpenFiler
• HPE MSA and Alletra, Dell EMC, Supermicro
• Proxmox Backup Server
• HPE Data Protector, Veeam Backup & Replication
• Acronis, Symantec Ghost
• Cron-based backups and Bash scripting

Networking

• OSI model and TCP/IP architecture
• IP subnetting and VPN
• L2/L3/L4 network management (Cisco, HPE, Aruba, Huawei)
• VLAN and network segmentation
• 802.1X authentication (FreeRADIUS, PacketFence, Microsoft NPS)

Security

• Firewall and UTM management
• FortiGate, Palo Alto, SonicWall, WatchGuard
• Linux firewall (pfSense, iptables)
• Basic penetration testing and security tools

Legacy Platforms

• Microsoft Exchange Server (2007–2010)
• Microsoft TMG / ISA Server