The science of science and innovation policy : hearing before the Subcommittee on Research and Science Education, Committee on Science and Technology, House of Representatives, One Hundred Eleventh Congress, second session, September 23, 2010

The Endangered Species Act : reviewing the nexus of science and policy : hearing before the Subcommittee on Investigations and Oversight, Committee on Science, Space, and Technology, House of Representatives, One Hundred Twelfth Congress, first session, Thursday, October 13, 2011

The growth of global space capabilities : what is happening and why it matters : hearing before the Subcommittee on Space and Aeronautics, Committee on Science and Technology, House of Representatives, One Hundred Eleventh Congress, first session, November 19, 2009

Quality science for quality air : hearing before the Subcommittee on Energy and Environment, Committee on Science, Space, and Technology, House of Representatives, One Hundred Twelfth Congress, first session, Tuesday, October 4, 2011

Exploring Mars and beyond : what's next for U.S. planetary science : hearing before the Subcommittee on Space and Aeronautics, Committee on Science, Space, and Technology, House of Representatives, One Hundred Twelfth Congress, first session, Tuesday, November 15, 2011

Advanced Research Projects Agency for Health (ARPA-H) : considerations for Congress

Strengthening NASA's technology development programs : hearing before the Subcommittee on Space and Aeronautics, Committee on Science and Technology, House of Representatives, One Hundred Eleventh Congress, first session, October 22, 2009

America COMPETES Act and the FY2010 budget

Impacts of U.S. export control policies on science and technology activities and competitiveness : hearing before the Committee on Science and Technology, House of Representatives, One Hundred Eleventh Congress, first session, February 25, 2009

Making EPA great again : hearing before the Committee on Science, Space, and Technology, House of Representatives, One Hundred Fifteenth Congress, first session, February 7, 2017