Mac OS X Server, FreeBSD, Metro Area Networking, DNS, LDAP, Active Directory, Open Directory, Windows 2003 Server, Fibre Channel, Routing and Switching, Security, Darwin Streaming Server, Mass Deployments, Shell Scripting, Bash, FileMaker Pro and FileMaker Pro Server, Debian, Red Hat Enterprise Linux, Fedora Core Linux, DNS and BIND, Xsan, XML, MySQL, Apache, Samba, SuSe, Perl, CentOS, AIX, Cisco PIX, SlackWare
Steve Jobs, Steve Wozniak, Neil Stephenson, Robert Heinlein, Arthur C. Clarke, Douglas Adams, Isaac Asimov, Neil Pert, John Bonham, Robert Johnson
Author of Mac Tiger Server Little Black Book
Author of Web Scripting Little Black Book
Author of Mac OS X Security
Author of Advanced Mac OS X Networking
Author of the SANS course on Mac OS X Security Course