Tom DeMarco and Timothy Lister are principals of the Atlantic Systems Guild (www.systemsguild.com), a consulting firm specializing in the complex processes of system building, with particular emphasis on the human dimension. Together, they have lectured, written, and consulted internationally since 1979 on management, estimating, productivity, and corporate culture.

Tom DeMarco is the author or coauthor of nine books on subjects ranging from development methods to organizational function and dysfunction, as well as two novels and a book of short stories. His consulting practice focuses primarily on expert witness work, balanced against the occasional project and team consulting assignment. Currently enjoying his third year teaching ethics at the University of Maine, he lives in nearby Camden.

Timothy Lister divides his time among consulting, teaching, and writing. Based in Manhattan, Tim is coauthor, with Tom, of Waltzing With Bears: Managing Risk on Software Projects (Dorset House Publishing Co., Inc., 2003), and of Adrenaline Junkies and Template Zombies: Understanding Patterns of Project Behavior (Dorset House Publishing Co., Inc., 2008), written with four other principals of the Atlantic Systems Guild. He is a member of the IEEE, the ACM, and the Cutter IT Trends Council, and is a Cutter Fellow.