I have over 25 years experiencing managing large networks and datacenters. Currently I manage a network of 15,000 nodes over 50 remote sites and two datacenters. Experience includes Windows, Linux, SQL clusters, VMWare, OpenVMS, openssl, openldap, RADIUS, TACACS, DNS (BIND), DHCP (ICS), Cisco switches and routers, VPN gateways, pen testing, and more.