OS Administration (Windows, Linux, UNIX, macOS)
Cloud (AWS, GCP)
Virtualization (VMware, HyperV, Docker, Kubernetes, Helm)
Storage (Netapp, Dell, QNAP, Synology)
M365 Administration
Google Workspace Administration
Monitoring, Alerting & Visualization (Prometheus, Grafana, Zabbix, XYMON, Solarwinds)
DBMS (MSSQL, Cassandra, CockroachDB)
Endpoint Management (SCCM, Lansweeper, BatchPatch)
Backup (NetBackup)
Development/Scripting (Powershell, Bash, Perl, Python)