Member Directory The AAS maintains a membership directory to facilitate member interaction and to support the conduct of official Society business. Search directory for: Filter Results By Clear Filters Type of Science State DC (1) Facet State City Baltimore (1) Gaithersburg (1) Germantown (1) Greenbelt (2) Mitchellville (1) Facet City Membership Class E (1) F (1) Facet Membership Class Division DPS (1) HEAD (1) Facet Division