Family background; education (Ph.D. from University of California at Berkeley in 1950); academic affiliations. Experience at University of California at San Diego, and consultantship to the weapons laboratory at Los Alamos with Kenneth Watson leading to Project 137 (John Wheeler) which later became JASON; Brueckner's reasons for leaving JASON in 1966. Organization, collaboration and policy of JASON; significance and selection of projects; technical advice; preponderance of theoretical physicists in JASON; uniqueness and impact of JASON; other consultantships and advisory involvements.