Danny works with Oracle Corporation.
He works with Java SE, Java ME and JavaFX. He is Oracle's Java SE/EE representative on the Executive Committee for the Java Community Process.

Kevlin is an independent consultant and trainer based in the UK. His development interests are in patterns, programming, practice and process. He has been a columnist for various magazines and web sites, including Better Software, The Register, Java Report and the C/C++ Users Journal. Kevlin is co-author of A Pattern Language for Distributed Computing and On Patterns and Pattern Languages, two volumes in the Pattern-Oriented Software Architecture series. He is also editor of the 97 Things Every Programmer Should Know site and book.

William O'Mullane has a background in Computer Science and has worked on space science projects since 1996 when he assisted with the production of the Hipparcos CDROMS. During this period he was also involved with the Planck and Integral science ground segments as well as contemplating the Gaia data processing problem. From 2000-2005 Wil worked on developing the US National Virtual Observatory (NVO) and on the Sloan Digital Sky Survey (SDSS) in Baltimore, USA. In August 2005 he rejoined the European Space Agency as Gaia Science Operations Development Manager to lead the ESAC development effort for the Gaia Data Processing and Analysis Consortium.

Ken Schwaber loves the software development profession, having gone from bottle washer to cook to restaurant owner. He started as an operating systems programmer, and now spends his time trying to restore the profession to its former joys and glory. He co-founded the Scrum process with Jeff Sutherland, developed and was a signatory to the Agile Manifesto, and founded the Agile Alliance and Scrum Alliance. He now spends his days at Scrum.org. Ken lives with his family is Lexington, Massachusetts.

Hans-Willem van Vliet is Managing Director for Research & Development at Otto Bock Healthcare Products GmbH in Vienna. He studied mechanical engineering at the Delft University of Technology and obtained his PhD on the topic Design for Manufacturing. He joined the medical Otto Bock company in 2002 and became responsibility for the microprocessor-controlled knee prostheses, before taking over the entire R&D department in 2008. Within the company group, the Otto Bock Healthcare Products GmbH with over 400 employees, is responsible for the development and production of high-end electronic exo-prostheses, orthoses and neuro-stimulation devices. Around 30 software developers at the site are responsible for the embedded and pc software in and for these products.