Mark Galassi has been involved in the GNU project since 1984. He currently works as a researcher in the International, Space, and Response division at Los Alamos National Laboratory, where he has worked on the HETE-2 satellite, ISIS/Genie, the Raptor telescope, the Swift satellite, and the muon tomography project. In 1997 Mark took a couple of years off from Los Alamos (where he was previously in the ISR division and the Theoretical Astrophysics group) to work for Cygnus (now a part of Red Hat) writing software and books for eCos,although he continued working on the HETE-2 satellite (an astrophysical Gamma Ray Burst mission) part time. Mark earned his BA in Physics at Reed College and a PhD from the Institute for Theoretical Physics at Stony Brook.