Kathy Sierra was lead developer for the SCJP for Java 5. Sierra worked as a Sun "master trainer," and in 1997, founded javaranch.com, the largest Java community website. Her books have won multiple Software Development Magazine awards, and she is a founding member of Sun's Java Champions program.Bert Bates was a lead developer for several of Sun's Java certifications including the SCJP for Java 5. He is also a forum moderator on javaranch.com, a 20-year software developer veteran, and co-author of several bestselling Java books. Bert is is a founding member of Sun's Java Champions program.