Kathy Sierra

Kathy Sierra
Sierra speaking at eTech in 2008
Born	1957 (age 59–60) California
Alma mater	Cal Poly San Luis Obispo, UCLA
Occupation	Programming instructor, game developer

Kathy Sierra (born 1957) is an American programming instructor and game developer.

Sierra attended Cal Poly San Luis Obispo with a major in exercise physiology and spent 10 years working in the fitness industry. She changed careers after attending programming classes at UCLA, later returning to teach a course on "new media interactivity" for UCLA Extension. She also led the new media team at Mind over Macintosh, a Los Angeles training center that provided training to advertising and entertainment corporations adapting digital technologies in the mid 1990s. She was the lead programmer on the computer games Terratopia, a 1998 children's adventure game released by Virgin Sound & Vision, and All Dogs Go to Heaven, a film-based game released as a free cereal premium by MGM. She also worked as a master trainer for Sun Microsystems, teaching Java instructors how to introduce new Java technologies and developing certification exams. In 1998, she founded the Java programmer's online community JavaRanch.

She is the co-creator of the Head First series of books on technical (primarily computer) topics, along with her partner, Bert Bates. The series, which began with Head First Java in 2003, takes an unorthodox, visually intensive approach to the process of teaching programming. Sierra's books in the series have received three nominations for Product Excellence Jolt Awards, winning in 2005 for Head First Design Patterns, and were recognized on Amazon.com's yearly top 10 list for computer books from 2003 to 2005. In 2005 she coined the phrase "The Kool-Aid Point" to describe the point at which detractors emerge purely due to the popularity of a topic being promoted by others.

Sierra says that her interest in cognitive science was motivated by her epilepsy, a condition for which she takes anti-seizure medication. "My interest in the brain began when I had my first grand mal seizure at the age of four," she wrote on her personal weblog.