Advanced AWS administration: RDS, S3, EC2, WAF, Load Balancer, Route 53, cost management, Oracle Cloud: Infrastructure administration, service configuration, Azure and Google Cloud management, Hyper-V, VMware, Proxmox, Cisco Networks (CCNA): Routing, switching, wireless, Firewall Pfsense, Fortigate administration, SentinelOne security implementation, Windows Servers: DNS, DHCP, IIS, FTP, WSUS, AD, GPO, Linux Servers: Apache, Nginx, MySQL, PostgreSQL, Samba, FTP, SSH, Nagios, Zabbix, ManageEngine, Zabbix, Middleware (JbossAS, Tomcat, Apache), Advanced Active Directory with ADManager and ADSelfService Plus, GLPI implementation, ITSM, Fusion inventory management, Veeam Backup for on-premises and cloud, Dell SCv20xx Storage administration, Office 365 and Google Workspace administration, MigrationWiz expertise, 3CX VoIP systems administration, Integration of Active Directory with Azure and Office 365 using AD Connect