Project lead at Software Carpentry, an open source course on basic computational skills for scientists and engineers.
Regularly supervises Google Summer of Code projects and other student programming projects.
Author of Data Crunching, co-author of Practical Programming (a CS-1 textbook using Python), co-editor of Beautiful Code (winner of a 2008 Jolt Award), and currently working on books on empirical software engineering (for O'Reilly) and the architecture of open source applications (for Pragmatic).
Co-author of PEP 218: Adding a Built-In Set Object Type (and still disappointed that you have to write 'set()' instead of '{/}' for the empty set).
Personal site at https://www.third-bit.com.
Best contact point is gvwilson@third-bit.com.