Dan Anderson (T2) has been a VMware employee for five years, the first four years as a key contributor to the VMware Professional Services Organization in the role of Consulting Architect. Dan is currently a Senior Architect and Team Lead for the Global Engineering Technical Operations Team. This Global team is responsible for planning and managing all hands-on labs forVMworld, VMware's premier industry event, as well as various other events throughout the year. In addition, Dan's team works directly for VMware Engineering, with responsibility for architecture and internal deployments of all VMware products prior to release to the general public.

David Beazley (S5, M5, M7) is the author of the Python Essential Reference and has been an active member of the Python community since 1996. He is most widely known for creating several Python-related open-source packages, including SWIG, a tool for building C/C++ extension modules to Python, and PLY, a Python version of the lex/yacc parsing tools. In the 1990s, while working at Los Alamos National Laboratory, he helped pioneer the use of Python on massively parallel supercomputers. From 1998 to 2005, he was an assistant professor at the University of Chicago, where he taught courses on operating systems, networks, and compilers. Dave is currently the owner of Dabeaz LLC, a company specializing in Python software development and training courses.

Milind Bhandarkar (S3) has been working with Hadoop and Pig since version 0.1.0 for both. He started the Yahoo! Grid solutions team focused on training, consulting, and supporting hundreds of new migrants to Hadoop and Pig. He has been focused on parallel programming languages and paradigms for over 20 years. He worked at the Center for Development of Advanced Computing (C-DAC), Center for Simulation of Advanced Rockets, Siebel Systems, and Pathscale Inc. (acquired by QLogic) before settling at Yahoo! in 2005.

Adrian Cockcroft (T6) is well known as a Distinguished Engineer at Sun Microsystems and eBay Research Labs and is currently Director of Web Engineering at Netflix. Author of four books on performance tuning and capacity planning, he has been inspired by his involvement in the Homebrew Mobile Phone club to invent the term "Millicomputing" and apply ultra low power devices to enterprise computing applications.

Richard Elling (S2) has been designing and building dependable, networked computer systems to solve complex problems for more than 25 years. He was an early adopter of ZFS and has developed benchmarks and analysis techniques for evaluation of data protection schemes and performability of systems. He wrote Designing Enterprise Solutions with Sun Cluster 3.0 (Prentice Hall, 2002) and has authored many white papers, Sun BluePrints, and refereed papers on dependable systems and performability. He is a regular contributor to the ZFS community.

Jacob Farmer (T7, T8) is a well-known figure in the data storage industry. He has written numerous papers and articles and is a regular speaker at trade shows and conferences. In addition to his regular expert advice column in the "Reader I/O" section of InfoStor Magazine, the leading trade magazine of the data storage industry, Jacob also serves as the publication's senior technical advisor. Jacob has over 18 years of experience with storage technologies and is the CTO of Cambridge Computer Services, a national integrator of data storage and data protection solutions.

Wenjin Hu (M2) is a graduate student at Clarkson University. He is the author of the network chapter in the book Running Xen: A Hands-on Guide to the Art of Virtualization. While at Clarkson, Wenjin has investigated a lot of different virtualization systems, co-authored an academic paper entitled "Quantifying the Performance Isolation Properties of Virtualization Systems" and a ;login: article on Solaris virtualization. For his PhD research he focuses on Xen virtualization and file systems, trying to apply the techniques in those two fields to provide a more secure and reliable desktop enviroment for common users. Currently, he is also tackling Solaris xVM.

David J. Malan (T3) is a Lecturer at Harvard University, where he received his Ph.D., S.M., and A.B. and now teaches Harvard College's 300-student introductory course in computer science as well as "Building Dynamic, Scalable Websites" at Harvard Extension School. He also serves as Chief Information Officer for Mindset Media, LLC, where he designed Web-based infrastructure capable of 500M hits per day with peaks of 10K per second. His research background ranges from cybersecurity and forensics to pedagogy.

Patrick McDaniel (T5) is an Associate Professor in the Computer Science and Engineering Department at the Pennsylvania State University and co-director of the Systems and Internet Infrastructure Security Laboratory. Patrick's research efforts centrally focus on network, telecommunications, and systems security, language-based security, and technical and public policy issues in digital media. Patrick was awarded the National Science Foundation CAREER Award and has chaired several top conferences in security, including, among others, the 2007 and 2008 IEEE Symposiums on Security and Privacy and the 2005 USENIX Security Symposium. Patrick is the editor-in-chief of the ACM journal Transactions on Internet Technology (TOIT) and serves as associate editor of the journals ACM Transactions on Information and System Security and IEEE Transactions on Software Engineering. Prior to pursuing his Ph.D. in 1996 at the University of Michigan, Patrick was a software architect and program manager in the telecommunications industry.

Marco Nicosia (M3) has been working with Hadoop since version 0.6.0. He started the first Yahoo! Production Operations team focused on maintaining general-use Hadoop clusters. He has been a UNIX system administrator for over 15 years, variously supporting more than 10,000 users or 10,000 computers in both casual and production environments. He previously worked at the University of California, Inktomi Corporation, and Walmart.com before settling at Yahoo! in 2004.

Zach Shepherd (M2) is an undergraduate student studying computer science, physics, and mathematics at Clarkson University. At Clarkson, he has collaborated with students and professors on various Xen-related projects, including the setup of a Xen-based infrastructure for the Clarkson Open Source Institute and research in virtualization benchmarking. Zach was a technical reviewer for Running Xen: A Hands-on Guide to the Art of Virtualization.

Abe Singer (S6, M6, M8) is based at the California Institute of Technology as the Chief Security Officer for LIGO Labs, an observatory spanning multiple sites and two universities. He was previously Chief Security Officer and security researcher for the San Diego Supercomputer Center. In past lives, he worked as a system administrator and programmer. He is also the author of the SAGE Short Topics booklet Building a Logging Infrastructure.

Marc Staveley (M1) is now an independent consultant, applying his years of experience with UNIX development and administration to helping clients with server consolidation and application migration projects. Previously Marc has held positions at SOMA Networks, Sun Microsystems, NCR, and Princeton University. He is a frequent speaker on the topics of standards-based development, multi-threaded programming, system administration, and performance tuning.

Theodore Ts'o (M4, T4) has been a Linux kernel developer since almost the very beginnings of Linux: he implemented POSIX job control in the 0.10 Linux kernel. He is the maintainer and author of the Linux COM serial port driver and the Comtrol Rocketport driver, and he architected and implemented Linux's tty layer. Outside of the kernel, he is the maintainer of the e2fsck filesystem consistency checker. Ted is currently employed by IBM Linux Technology Center.