.Principal Advice, Ames Investigation CenterDan Hymer (Acting).Main Guidance, Armstrong Flight Research CenterBrett Swanson.Principal Guidance, Glenn Proving Ground Callista M. Puchmeyer.Principal Guidance, Goddard Area Tour CenterDave G. Barrett.Chief Guidance, Johnson Space CenterRandall T. Suratt (Acting).Main Advice, Kennedy Room CenterAlex Vinson.Main Advice, Langley Study CenterAndrea Z. Warmbier.Principal Advise, Marshall Area Tour CenterPam A. Bourque.Principal Guidance, NASA Administration Office at JPL James T. Mahoney.Main Advice, NASA Shared Service Center Ron Bald.Chief Guidance, NASA Stennis Space Center Ron Bald.