When Valerie Allen decided she did not want to be a Montessori teacher any longer, she began work on her MLIS. Immediately she learned concepts she could apply to her new job as information specialist for the Department of Energy's (DOE) Office of Scientific and Technical Information (OSTI) at Oak Ridge National Laboratory, TN. While the LIS program taught her impressive technical skills, no program can teach someone to reason their way through complex problems as skillfully as Allen does. Allen's first assignment, with the Virtual Library Design Requirements Team, was to develop a digital library of all energy-related science and technology research conducted by DOE agencies. Allen's team then implemented "Explorit" search technology to provide seamless electronic access to 450 separate databases and web sites from DOE, other government agencies, and other organizations. This inter-agency collaboration became a model for the development of Science.gov, which debuted in 2002. Under Allen's leadership, an alliance of 12 federal agencies built Science.gov, which lets users search 47 million-plus pages of government information with one query. This article summarizes the accomplishments of Valerie Allen of the U.S. Department of Energy.