Working knowledge of HAProxy, Apache/Nginx, FTP/SFTP, Postfix/SMTP, MySQL/MariaDB, Docker, Prometheus, Grafana, DNS/BIND, Windows Server Failover Clustering, SQL Server Failover Cluster Instances, or comparable technologies. Troubleshoot complex networking, DNS, routing, firewall, load-balancing, TLS, storage, Fibre Channel, SAN/NAS, backup, database, container, web, file-transfer, and messaging issues.