Dr. David F. Rico is an expert in lean and agile project management with over 28 years of experience working on large government IT projects around the world. He has authored several books and articles on agile program management and lean development practices. The document discusses key concepts of agility, agile project management, how lean and agile intersect, a lean and agile project management model, virtual teams, advantages and pitfalls of virtual teams, and varieties of virtual team structures.