Paolo Calafiura is a scientific applications programmer who works on the infrastructure of large high energy and nuclear physics applications. Currently he collaborates on the Atlas experiment at CERN and on CDF at FermiLab. His interests include architectures and frameworks, code generation, data handling, and data models. Before joining NERSC, Paolo was a post-doc at CERN and at the Scuola Normale Superiore of Pisa, where he also graduated in Physics. His home page is http://electra.lbl.gov/paolo.html.

Chris Day works on the Athena Software Framework for the Atlas experiment under construction at CERN in Geneva, Switzerland. His particular interests include software architecture design, data models for HEP events, and interactive interfaces. He is also working to improve the software development process of the group. He received his Ph.D. in HEP from Cornell in 1979 and has been working with object-oriented computer languages for 25 years.

Igor Gaponenko is a computer software engineer currently working on the database software of the BaBar experiment at SLAC. His professional interests include automation of data handling at HEP experiments, distributed software systems, parallel programming, data acquisition, and real-time software. Before starting to work at Berkeley Lab (1998) and NERSC, Igor was responsible for the architecture and core software development of the data acquisition system for the SND (Spherical Neutral Detector) experiment at the VEPP-2M collider located at the Budker Institute of Nuclear Physics in Novosibirsk, Russia. Igor graduated in Physics and Computer Science from Novosibirsk State University in 1989.

Wim Lavrijsen is a software engineer and member of the core software team of Atlas, a high energy physics experiment which is under construction at CERN.  His interests include generic programming, bioinformatics, expert systems, user interfaces and software configuration. Wim started research in computer science in 1996 at Oce Technologies, but soon returned to HEP. He received his Ph.D. from Nijmegen University in 2002.

Charles Leggett is a computer systems engineer with a background in High Energy Physics, and is currently involved in developing the infrastructure of the ATLAS analysis framework. He is also interested in benchmarking the performance of the gnu C++ compiler, and maintains a site tracking the results. He received his PhD in HEP from the University of Michigan in Ann Arbor in 1998, studying B decays on the L3 experiment at CERN. His home page is http://annwm.lbl.gov/~leggett

Massimo Marino is spending two years at CERN in Geneva to serve as a focal point in getting collaborators at CERN and around Europe more closely involved with the development of the ATLAS software framework, led by David Quarrie. Massimo is working with these users to help the software project respond to their specific needs, and he is also sharing information about ongoing software development with other experimental groups at CERN. Massimo coordinates the efforts to provide and run Tutorials on the use of the Atlas offline framework Athena. He is also an active member of the SEAL LCG group at CERN ( http://seal.web.cern.ch/seal/ ). The purpose of the project is to provide the software infrastructure, basic frameworks, libraries and tools that are common among the LHC experiments. The project should address the selection, integration, development and support of foundation and utility class libraries.

David Quarrie is chief software architect for the ATLAS high-energy physics experiment. The task is to produce and implement the framework or environment in which scientists will write the physics algorithms to do the physics they need to do as part of the ATLAS experiment, an international research program to be carried out at the Large Hadron Collider at CERN in Switzerland beginning in 2005. David directs the development of all the off-line software for reconstruction, simulation, physics analysis, and the final real-time filter for on-line data generation and collection. He also works on software efforts related to the BaBar project at the Stanford Linear Accelerator Center. Trained as a physicist, David earned his Ph.D. from University College London and has been involved in high energy physics computing since 1970. He has worked at Berkeley Lab since 1993.

Craig Tull is spending a year at CERN in Geneva to serve as a focal point in getting collaborators at CERN and around Europe more closely involved with the development of the ATLAS software framework, led by David Quarrie. Craig is working with these users to help the software project respond to their specific needs, and he is also sharing information about ongoing software development with other experimental groups at CERN.