Dan Langille has been using FreeBSD since 1998 and almost immediately he started documenting his experiences. This online journal eventually became The FreeBSD Diary. He is very good at describing the step-by-step procedures to perform a wide variety of tasks, from changing your prompt to creating and maintaining jails.
Having studied as a software engineer, Dan has picked up sysadmin and database skills along the way, and now works as a sysadmin for a IntelSec company.
He is the founder of BSDCan, PGCon, FreshPorts, and FreshSource. He's a keen mountain biker and seems to thrive on deadlines