During her career, Garver worked in the nonprofit, government, and commercial sectors. Garver has held advocacy roles for space exploration as a member of the NASA Advisory Council, a guest lecturer at the International Space University, president and board member of Women in Aerospace, and president of the American Astronautical Society. She was awarded both the NASA Distinguished Public Service Medal, and the NASA Distinguished Service Medal. Garver served as the second Executive Director of the National Space Society, a non-profit space organization based in Washington, D.C. for nine years, leaving the organization in 1998. From 1998-2001, she served as the Associate Administrator of the Office of Policy and Plans for the National Aeronautics and Space Administration. Reporting directly to the NASA Administrator, she managed the analysis, development, and integration of NASA policies and long-range plans, the NASA Strategic Management System, the NASA Advisory Council, and the History Division. Prior to this appointment, Garver served as a Senior Policy Analyst for the Office of Policy and Plans, and Special Assistant to the Administrator. In 2001-2002, Garver initiated a project to increase the visibility and viability of commercial spaceflight. While providing support to a client who was paying for a trip to space, she attempted to secure her own sponsored space flight, as "the first Soccer Mom" aboard the Russian Soyuz vehicle to the International Space Station. She worked to secure sponsorship funding as she began the initial medical certification and training in Star City, Russia. The effort ended because of a conflicting bid from another prospective space tourist. Garver was the President of Capital Space, LLC, and served as a Senior Advisor for Space at the Avascent Group, based in Washington, D.C. She served as Vice President of DFI Corporate Services from 2001-2003. In these roles, Garver provided strategic planning, technology feasibility research and business development assistance. She also gave merger, acquisition, and strategic alliance support to financial institutions and Fortune 500 companies in many industries. Garver served as a lead space policy advisor for the Barack Obama, Hillary Clinton and John Kerry campaigns for president. In November 2008, she was named to lead the Obama Presidential Transition Agency Review Team for NASA. In 2016 Garver founded the Brooke Owens Fellowship, which offers paid summer internships to college undergraduate women planning to pursue aviation or space careers.
NASA career
Garver's confirmation as deputy administrator marks the second time she has worked for NASA. Her first period of service to the agency was from 1996 to 2001. She first served as a special assistant to the NASA administrator and senior policy analyst for the Office of Policy and Plans, before becoming the associate administrator for the Office of Policy and Plans. Reporting to the NASA administrator, she oversaw the analysis, development and integration of policies and long-range plans, the NASA Strategic Management System, and the NASA Advisory Council. In June 2010, she addressed the United Nations Committee on the Peaceful Uses of Outer Space, and signed an Earth science satellite agreement. She has participated in several NASA launch Tweetups. In May 2011, she joined NASA scientists to participate in a field campaign studying how dust affects the snow cover in the Colorado River Basin. The team visited dust emission sites in the deserts of Utah and then snowpits in the Colorado mountains to learn how dust layers might help predict snow melt.