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Space Studies Board
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Colleen Hartman, Director for Space and Aeronautics
Alan Angleman, Senior Program Officer*
Mia Brown, Research Associate
Megan Chamberlain, Senior Program Assistant
Arthur Charo, Senior Program Officer
Dwayne Day, Senior Program Officer*
Sandra Graham, Senior Program Officer
Gaybrielle Holbert, Senior Program Assistant
Meg Knemeyer, Financial Officer*
Radaka Lightfoot, Senior Financial Assistant*
Daniel Nagasawa, Associate Program Officer
Celeste A. Naylor
, Information Management Associate*
Tanja Pilzak, Manager, Program Operations*
Andrea Rebholz, Program Coordinator*
Abigail Sheffer, Senior Program Officer
David Smith, Senior Program Officer
Dionna Wise, Program Coordinator
*denotes ASEB Staff

COLLEEN HARTMAN is the Director of the Aeronautics and Space Engineering Board (ASEB) and the Space Studies Board (SSB) of the U.S. National Academies of Sciences, Engineering, and Medicine. Dr. Hartman has served in various senior positions, including Acting Associate Administrator, Deputy Director of Technology and Director of Solar System Exploration at NASA’s Science Mission Directorate and Deputy Assistant Administrator at the National Oceanic and Atmospheric Administration. Dr. Hartman was instrumental in developing innovative approaches to powering space probes destined for the farthest reaches of the solar system, including in‐space propulsion and nuclear power and propulsion. She also gained administration and congressional approval for an entirely new class of competitively selected missions called "New Frontiers," to explore the planets, asteroids and comets in the Solar System. Dr. Hartman has built and launched balloon and spacecraft payloads, worked on robotic vision, and served as Program Manager for dozens of space missions, including the Cosmic Background Explorer (COBE). Data from the COBE spacecraft gained two NASA‐sponsored scientists the 2006 Nobel Prize in Physics. Dr. Hartman earned a bachelor's degree in zoology from Pomona College in Claremont, Calif., a master's in public administration from the University of Southern California, and a doctorate in physics from the Catholic University of America. She started her career as a Presidential Management Intern under Ronald Reagan. Her numerous awards include the Claire Booth Luce Fellowship in Science and Engineering, the NASA Outstanding Performance Award, and multiple Presidential Rank Awards, one of the highest awards bestowed by the President of the United States to senior executives.

ALAN ANGLEMAN has been a senior program officer with the Aeronautics and Space Engineering Board for more than 20 years, directing studies on the modernization of the U.S. air transportation system, strategic planning for aeronautics and space technology, cost growth of NASA Earth and space science missions, the safety of space launch systems, radioisotope power systems, aviation weather systems, aircraft certification standards and procedures, supersonic aircraft, and other aspects of aeronautics and space research and technology. Previously, Mr. Angleman worked for consulting firms in the Washington, D.C., area providing engineering support services to the Department of Defense and NASA. His professional career began with the U.S. Navy, where he served for nine years as a nuclear-trained submarine officer. He has a B.S. in engineering physics from the U.S. Naval Academy and an M.S. in applied physics from the Johns Hopkins University.    

MIA BROWN joined the Space Studies Board as a Research Associate in 2016. She comes to SSB with experience in both the civil and military space sectors and has primarily focused on policies surrounding US space programs in the international sector. Some of these organizations include NASA’s Office of International and Interagency Relations, Arianespace, the United Nations Office for Disarmament Affairs (Austria), and the U.S. Department of State. From 2014 to 2015, Mia was the Managing Editor of the International Affairs Review. She received her M.A. in International Space Policy from the Space Policy Institute at the Elliott School of International Affairs. Prior to entering the Space Policy Institute, Mia received her M.A. in Historical Studies from the University of Maryland-Baltimore County (UMBC), where she concentrated in the history of science, technology, and medicine and defended a thesis on the development of the 1967 Outer Space Treaty. 

ARTHUR A. CHARO has been a senior program officer with the Space Studies Board (SSB) since 1995. For most of this time, he has worked with the Board’s Committee on Earth Science and Applications from Space and the Committee on Solar and Space Physics. He has directed studies resulting in some 37 reports, notably inaugural NRC “decadal surveys” in solar and space physics (2002) and Earth science and applications from space (2007). He also served as the study director for the second NRC decadal survey in solar and space physics (2012) and is currently the study director for the second Earth science decadal, which will release its report by the end of 2017. Dr. Charo received his Ph.D. in experimental atomic and molecular physics in 1981 from Duke University and was a post-doctoral fellow in Chemical Physics at Harvard University from 1982-1985. He then pursued his interests in national security and arms control as a Fellow, from 1985-1988, at Harvard University’s Center for Science and International Affairs. From 1988-1995, he worked as a senior analyst and study director in the International Security and Space Program in the Congressional Office of Technology Assessment. In addition to contributing to SSB reports, he is the author of research papers in the field of molecular spectroscopy; reports on arms control and space policy; and the monograph, Continental Air Defense: A Neglected Dimension of Strategic Defense (University Press of America, 1990). Dr. Charo is a recipient of a MacArthur Foundation Fellowship in International Security (1985-1987) and a Harvard-Sloan Foundation Fellowship (1987-1988). He was a 1988-1989 American Association for the Advancement of Science (AAAS) Congressional Science Fellow, sponsored by the American Institute of Physics.

DWAYNE DAY joined the Space Studies Board in 2005. He has served as the staff officer and study director for NRC studies on: the assessment of space radiation hazards to astronauts, the future of NASA’s workforce, NASA’s performance in solar system exploration, and on options for the next New Frontiers mission selection. He has a Ph.D. in political science from The George Washington University, specializing in space and national security policy. Dr. Day is the author of Lightning Rod, a history of the Air Force chief scientist’s office; has co-edited or edited several books and journal issues, and has written on American civil and military space policy and history. Prior to joining the SSB, he worked as an investigator for the Columbia Accident Investigation Board. Prior to that, he worked for the Congressional Budget Office and at George Washington University’s Space Policy Institute.

SANDRA J. GRAHAM joined the Space Studies Board as a senior program officer in 1994. A recipient of the National Academies Distinguished Service Award, Dr. Graham has directed a large number of major studies, many of them focused on space research in biological and physical sciences and technology. Her more recent work includes an assessment of servicing options for the Hubble Space Telescope, reviews of the NASA roadmaps for space sciences and the International Space Station, and a review of NASA’s Space Communications program while on loan to the Aeronautics and Space Engineering Board. She directs the activities of the Committee on Planetary and Lunar Exploration. Prior to receiving her Ph.D. in inorganic chemistry from Duke University in 1990, she carried out research focused primarily on topics in bioinorganic chemistry, such as the exchange mechanisms and reaction chemistry of biological metal complexes and their analogs. From 1990 to 1994 she held the position of senior scientist at the Bionetics Corporation, where she worked in the science branch of the Microgravity Science and Applications Division at NASA headquarters.

MEG A. KNEMEYER is a financial officer for the Space Studies Board and the Aeronautics and Space Engineering Board. She previously worked with the NRC Executive Office, DEPS’ Naval Studies Board and Laboratory Assessments Board, the Office of Security, IOM, and the Commission on Physical Sciences, Mathematics, and Resources. She holds a M.A.Ed. in Education and Human Development from The George Washington University and a B.S. in Rehabilitation and Special Education from the University of Arizona.
RADAKA LIGHTFOOT is the Senior Financial Assistant for the Space Studies Board and the Aeronautics and Space Engineering Board. She previously worked with the Institute of International Education working on USAID funded projects to assist students from Indonesia, Egypt and Tanzania obtain their Bachelors and Masters degrees. Prior to that she was the Finance Support Specialist at the Regional Offices of Whole Foods Market. She holds a BA in Mass Media from the University of the District of Columbia and is a member of Delta Sigma Theta Sorority Incorporated.


CELESTE A. NAYLOR is the information management associate for the Space Studies Board. She collaborates with the staff to ensure adherence to division and institutional requirements through all phases of the committee creation process. She also enjoys managing the boards website, exhibits and report distribution. She joined the Space Studies Board in 2002. Ms. Naylor is a member of the Society of Government Meeting Professionals, Women in Aerospace and the American Women in Science. She has more than 15 years of experience in event management and over ten years working in content management. She has studied event management at George Washington University's School of Professional Studies and attended Trinity University in Washington, DC, where she studied communications.

DANIEL NAGASAWA is an associate program officer with the Space Studies Board. Before joining the SSB, he was a graduate research assistant specializing in stellar astrophysics, measuring the abundance of elements in the atmospheres of very old, metal-poor stars. Dr. Nagasawa began his research career as an undergraduate research assistant for the Cryogenic Dark Matter Search. When he began graduate school, he transitioned to designing and evaluating astronomical instrumentation, specifically ground-based spectrographs. He went on to specialize in high-resolution stellar spectroscopy and applied these techniques on stars in ultra-faint dwarf satellite galaxies of the Milky Way to study the chemical history of the Galaxy as part of the Dark Energy Survey (DES). He also developed skills in education and public outreach by teaching an observational astronomy course and writing for an outreach initiative for DES. Dr. Nagasawa earned his Ph.D. in Astronomy and his M.S in Physics at Texas A&M University; he earned his B.S. in Physics with a Concentration in Astrophysics from Stanford University.


TANJA E. PILZAK is the manager of program operations for the Space Studies Board. She comes to the SSB from the Division on Earth and Life Studies where she was a research associate for five years in the Board on Earth Sciences and Resources and the Board on Agriculture and Natural Resources. Prior to becoming a research associate, Ms. Pilzak was a proposal specialist and a contract assistant in the Office of Contracts and Grants for three years as. She holds an M.S. in environmental management from the University of Maryland University College and a B.S. in natural resources management from the University of Maryland College Park.


ANDREA REBHOLZ, program coordinator, joined the Aeronautics and Space Engineering Board in January 2009. She began her career at the Academies in October 2005 as a senior program assistant for the Institute of Medicine's Forum on Drug Discovery, Development, and Translation. Prior to the Academies, she worked in the communications department of a DC-based think tank. Ms. Rebholz has a BA in Integrative Studies--Event Management from George Mason University's New Century College, and earned the Certified Meeting Professional (CMP) designation in 2012. She has over 15 years of experience in event planning, project administration, and editing.


ABIGAIL A. SHEFFER is a senior program officer with the Space Studies Board (SSB) of the National Academies. In fall 2009, Dr. Sheffer served as a Christine Mirzayan Science and Technology Policy Graduate Fellow for the National Academies and then joined the SSB. Since coming to the National Academies, she has been the staff officer and study director on a variety of activities such as the Committee on Solar and Space Physics, Assessment of the National Science Foundation’s 2015 Geospace Portfolio Review, Achieving Science with CubeSats: Thinking Inside the Box, Landsat and Beyond—Sustaining and Enhancing the Nation’s Land Imaging Program, among others. Dr. Sheffer has been an assisting staff officer on several other reports, including Pathways to Exploration—Rationales and Approaches for a U.S. Program of Human Space Exploration and Solar and Space Physics: A Science for a Technological Society. Dr. Sheffer earned her Ph.D. in planetary science from the University of Arizona and A.B. in geosciences from Princeton University.


DAVID H. SMITH joined the Space Studies Board in 1991. He is the senior staff officer and study director for a variety of NRC activities in the general areas of astrobiology, planetary science and planetary protection. He also organizes the SSB’s Lloyd V. Berkner Space Policy Internships and the joint SSB-Chinese Academy of Sciences Forum for New Leaders in Space Science. He received a B.Sc. in mathematical physics from the University of Liverpool in 1976, achieved the honours standard in Part III of the Mathematics Tripos at the University of Cambridge in 1977, and a D.Phil. in theoretical astrophysics from Sussex University in 1981. Following a postdoctoral fellowship at Queen Mary College University of London (1980-1982), he held the position of associate editor and, later, technical editor of Sky and Telescope. Immediately prior to joining the staff of the SSB, Dr. Smith was a Knight Science Journalism Fellow at the Massachusetts Institute of Technology (1990-1991).


DIONNA WISE is a program associate with the Space Studies Board, having previously worked for The National Academies’ Division of Behavioral and Social Sciences and Education for five years. Ms. Williams has a long career in office administration, having worked as a supervisor in a number of capacities and fields. Ms. Williams attended the University of Colorado at Colorado Springs and majored in psychology.