Energy and Science Research Investment Act of 2002

Energy and Science Research Investment Act of 2002 - Instructs the Secretary of Energy to: (1) conduct a comprehensive program of fundamental research, including chemical sciences, physics, materials sciences, biological and environmental sciences, geosciences, engineering sciences, plasma sciences, mathematics, and advanced scientific computing; (2) expand scientific user facilities maintained by the Office of Science and make them an integral part of the departmental mission for exploring the frontiers of fundamental science; (3) maintain a leading-edge research capability in the energy-related aspects of nanoscience and nanotechnology, advanced scientific computing, and genome research; and (4) ensure that its fundamental science programs help inform Department of Defense DOE applied research and development programs.

Authorizes appropriations for FY 2003 through 2006.

Amends the Department of Energy Organization Act to create the position of Under Secretary for Energy Research and Science to: (1) serve as Science and Technology Advisor to the Secretary of Energy; (2) monitor (DOE) research and development programs; and (3) exercise authority over Assistant Secretaries implementing certain energy research, development, and energy technology functions.

Replaces the position of Director of the Office of Science with the position of Assistant Secretary of Science, who shall carry out DOE fundamental science and engineering research functions, including policy and management.

Expresses the sense of the House of Representatives that leadership for departmental missions in nuclear energy should be at the Assistant Secretary level.

Establishes in the Office of Science a Science Advisory Board to serve as the science advisor to the Assistant Secretary of Science.