Mike Keith is a co-specification lead for JPA 1.0 and a member of the JPA 2.0 and JPA 2.1 expert groups. He sits on a number of other Java Community Process expert groups and the Enterprise Expert Group (EEG) in the OSGi Alliance. He holds a Masters degree in Computer Science from Carleton University, and has over 20years experience in persistence and distributed systems research and practice.He has written papers and articles on JPA and spoken at numerous conferences around the world. He is employed as an architect at Oracle in Ottawa, Canada,and is married with four kids and two dogs.Merrick Schincariol is a senior engineer for the Oracle OC4J Java EE Container. He was a lead engineer for Oracle's EJB 3.0 release and co-author of Pro EJB 3: Java Persistence API. Before joining Oracle, Merrick developed enterprise and large-scale systems for the telecommunications industry.Massimo Nardone has more than 23 years of experiences in Security, Web/Mobile development, Cloud and IT Architecture and has been programming and teaching how to program with Android, Perl, PHP, Java, VB, Python, C/C++ and MySQL for more than 20 years. He currently works as Chief Information Security Office (CISO) for Cargotec Oyj and he is member of the ISACA Finland Chapter Board. Massimo has provided technical review for more than 40 IT books, and is the coauthor of Pro Android Games (Apress, 2015).