Thomas Hammell is a senior developer with Hewlett-Packard and part of the Open Call Business Unit, which develops telecom networks infrastruture software. Hammell has over 18 years of experience developing software. He has published numerous articles on Java topics, ranging from Swing development to unit testing. Hammell also lectures frequently on Java topics. He holds a bachelor's degree in electrical engineering and a master's degree in computer science from Stevens Institute of Technology.