He was appointed director of research in 1955 at Hercules Research Center, was elected
to the board of directors in 1960 and in 1967, he became vice-president. In 1968, he was appointed president of the American Chemical Society and then in 1972 named executive director.[3] After retiring from Hercules in 1971, he became deputy assistant secretary for science and technology at the U.S. Department of Commerce.[1]
Cairns led innovation in propellants for military rockets and in the photographic recording of explosive reactions. He then directed the role of Hercules as the major supplier to the U.S. military of these propellants.[3]