The Organizational Files Subseries documents Pendray's involvement with the American Interplanetary Society (later renamed American Rocket Society), the American Institute of Aeronautics and Astronautics (AIAA), the National Aeronautics and Space Administration (NASA), and the Guggenheim Foundation. The material pertaining to the American Interplanetary Society consists of financial documents, internal correspondence, meeting minutes, annual reports, published journals, photographs and sketches related to rocket tests, pamphlets, and newspaper clippings. The history of early rocket technology and some of the first experimental rockets are well-documented here. The bulk of the American Institute of Aeronautics and Astronautics related material consists of correspondence. Additional American Rocket Society material and a history of the AIAA's G. Edward Pendray Award are included also. The Guggenheim Foundation documents pertain to Pendray's involvement in establishing several aviation research centers. The bulk of the NASA related documents are printed materials that document NASA's developmental years.

The Public Relations Subseries includes material related to both Pendray and Company and the Public Relations Society of America. The Public Relations Society of America material documents the society's activities and impact on the profession at-large. Meeting minutes, annual reports, correspondence between members, and printed material related to the Society's publications are included. Some internal Pendray and Company documents and documents sent to and from clients are included (though the bulk are located in Series 4).