Catalin Tudose has a PhD in Computer Science, and over 15 years experience as a Senior Java Developer and Technical Team Lead. He works as a Java and Web Technologies Expert at Luxoft Romania, and as a professor at the Faculty of Automation and Computers in Bucharest. Petar Tahchiev is a software engineer with HP and the Jakarta Cactus lead developer. Felipe Leme is a JCP member and contributor to DbUnit and Cactus. Gary Gregory is a Java developer with 20+ years of experience who currently develops application servers for legacy integration. Vincent Massol was the author of the first edition of JUnit in Action.