Mim is serving in various consulting and board roles since her retirement as Vice President of Sandia's California Laboratory in Livermore. During her Sandia career, she worked on a wide variety of programs, including nuclear weapons, chemical and biological defense, missile defense, and solar energy, and provided leadership for a number of the laboratory's energy, national security and homeland security programs. She is a member of the DoD's Defense Science Board and Threat Reduction Advisory Committee. She is also Chair of the National Research Council's Naval Studies Board and serves on the Board of Directors of the National Institute for Hometown Security. She is a past member of the Air Force Scientific Advisory Board, the Board on Army Science and Technology, and DOE's National Commission on Science and Security. She was appointed a National Associate of the National Academies of Science and Engineering.

She chairs the California Council on Science and Technology. She is a member of the Board of Advisors for MIT Lincoln Laboratory, the Board of Directors for Draper Laboratory, and External Advisory Board of Savannah River National Laboratory. She is a member of the Board of Directors of SAIC and the Strategic Advisory Board for RedX Defense Systems. She is also a member of the Director's Review Committee for the National Ignition Facility at Lawrence Livermore National Laboratory, and has served on the Director Search Committees for both LLNL and Los Alamos. She is a member of the Dean's advisory board for the School of Science and Engineering and chairs the Advisory Board for the Department of Chemical and Biomolecular Engineering at Tulane University, where she has been recognized as an outstanding alumna.