Christina Hogan is one of the authors of The Practice of System and Network Administration and The Practice of Cloud System Administration. She has twenty years of experience in system administration and network engineering, from Silicon Valley to Italy and Switzerland. She has gained experience in small startups, mid-sized tech companies, and large global corporations. She worked as a security consultant for many years and her customers included eBay, Silicon Graphics, and SystemExperts. In 2005 she and Tom Limoncelli shared the SAGE Outstanding Achievement Award for the first edition of The Practice of System and Network Administration. She has a bachelor’s degree in mathematics, a master’s degree in computer science, a doctorate in aeronautical engineering, and a diploma in law. She also worked for six years as an aerodynamicist in a Formula 1 racing team and represented Ireland in the 1988 Chess Olympiad. She currently works as a Principal Engineer at AT&T and lives in Switzerland.