Crawford H. Greenewalt (1902-1993) was an executive with the DuPont Company and president of the firm from 1948 to 1962. In 1942, when the DuPont Company agreed to participate in the Manhattan Project, Greenewalt was named chief liaison, working with the physicists at the University of Chicago Metallurgical Laboratory, including Arthur Compton (1892-1962) and Enrico Fermi (1901-1954), who were developing techniques for plutonium separation. The collection consists of eight volumes of Greenewalt's diaries, which describe the history of the Manhattan Project and the development of the United States' first atomic bombs that were used to end the Second World War. The diaries describe the technical history of the project, as well as the relationships that developed between scientists.

Donald Fell Carpenter (1899-1985) was general manager of the Film Department at the DuPont Company. He graduated from the Massachusetts Institute of Technology (MIT) with a degree in engineering in 1922. Between 1927 and 1933 he held increasingly important managerial positions with the DuPont Viscoloid Company, and between 1933 and 1948 with the Remington Arms Company. In 1947 to 1948 he was a member of the Industrial Advisory Group to the U.S. Atomic Energy Commission. Broadly speaking, the materials in this small collection of his papers cover Carpenter's entire career, from his senior thesis at MIT (the design for an addition to his father's tinsmithing shop) to his involvement with political and civic affairs during his retirement.

The Savannah River Plant manufactured basic materials required in the production of nuclear weapons, specifically plutonium and tritium. The complex was comprised of five reactors, two chemical separation plants, a heavy water extraction plant, nuclear fuel, and target fabrication facility, a tritium extraction facility, and waste management facilities. The E. I. du Pont de Nemours and Company, Atomic Energy Division records are an expansive and rich collection of materials that document the DuPont Company’s involvement in the Manhattan Project and the company’s continued role in the United States government’s exploration of atomic power and weaponry.

The Hanford Engineer Works in Hanford, Washington, was constructed between 1943 and 1945 to create the plutonium 239 and uranium 235 used in the atomic weapons needed for World War II. Sponsored by the Army Corps of Engineers, E.I. du Pont de Nemours & Company acted as the prime contractor. This collection contains two captioned albums, one of the Medical Division between 1943 and 1945, and the other of Hanford Yuletide Carnival in 1943. The films are various format copies of "War construction in the desert", created to document the building and running of the Hanford Engineer Works. Also included is a film of African American workers dancing in one of the mess halls and a farewell party of DuPont executives in 1948.

Colonel Franklin T. Matthias (1908-1993) was commanding officer and area engineer of the Hanford Engineer Works of the Manhattan Engineer District. These are Colonel Matthias's personal papers documenting his work on the Manhattan Project. They include original declassified documents from Hanford and a variety of newspaper clippings and magazine articles collected by Matthias between the time he left Hanford to his death, reflecting his continuing interest in the Manhattan Project and nuclear power.

Franklin “Frank” T. Matthias (1908-1933) served as commanding officer and area engineer of Hanford Engineer Works from 1943 to 1945. He oversaw production of plutonium at Hanford to create the world’s first nuclear weapon, the atomic bomb. The bulk of the collection consists of photographs taken during the construction of the nuclear facilities at Hanford and the village of Richland in Washington state. Researchers interested in World War II, the Manhattan Project, industrial chemistry, nuclear energy, and company towns would find this collection useful.

Gilbert P. Church (1910-1993) was a civil engineer and the field project manager for E.I. du Pont de Nemours & Company at the Hanford Site during the Manhattan Project. His papers relate to the construction by DuPont for the United States government of the Hanford Engineer Works plutonium plant near Pasco, Washington.

The Hanford Engineer Works in Hanford, Washington, was a plutonium production facility that was first constructed during World War II. This item is a digital copy of the aerial photograph of the Hanford facility.

Richard Douglas Caney (1918-1994) was a chemical engineer with E.I. du Pont de Nemours & Company, working in the Explosives Department on the Manhattan Project. To remember his participation in the Manhattan Project, Caney prepared a scapbook of newspaper clippings of articles that flooded the media after the atomic bombs were dropped and the secrecy around the project ended.