CACR has a rather astounding inventory of computing goodies, and as the lead system administrator, I'm one of the folks who try to keep things running smoothly. I was also the Caltech site lead for the TeraGrid project for its first three years. (Now that I'm a "site lead emeritus", I'm finally able to be a full-time sysadmin again, something I've been looking forward to for quite a while now.) Some supplemental information about TeraGrid can be found here. A very brief bio can be found here. And a few “musings, rants, and other thoughts” can be found here.