I am a consultant and evaluator for atsec information security corporation performing Common Criteria, FIPS 140-2, and PCI evaluations. I am also involved in penetration testing and general security consulting services.
Some of my stronger interests include security, distributed algorithms, functional programming, language design, and just about anything to do with mathematics.
I generally read about a million lines of code for every line I write, so take all of my answers with that grain of salt.
Physics
Q&A for active researchers, academics and students of physics
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Server Fault
Q&A for professional system and network administrators
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers