Systems & support
Windows, Windows Server 2022, Linux (Ubuntu), Active Directory, Group Policy, AD CS (PKI), NPS/RADIUS, Microsoft Entra ID, account & access management, hardware/software troubleshooting, system maintenance.
Virtualization & cloud
Proxmox, Docker, VMware, VirtualBox, Microsoft Azure (VNet, NSG, NAT Gateway, VMs, Azure Files & File Sync, Backup, Site Recovery, Azure CLI).
Networking
TCP/IP, DNS, DHCP, VPN (WireGuard), switch & router configuration, firewall configuration, network monitoring systems (SolarWinds), wireless networking, connectivity troubleshooting.
Tools & productivity
Excel, Power BI, Git, command-line utilities, Python, SQL, Java, IT ticketing/helpdesk systems, Cisco Jabber, Webex.
Professional
Customer support & service-desk best practices, technical documentation, cross-team collaboration, issue escalation and follow-through.