Rodolfo Saracci first came to IARC in 1976. As an epidemiologist, he worked in the Unit of Epidemiology and Biostatistics, subsequently serving for an extended period (1983–1995) as the head of the Unit of Analytical Epidemiology. Since 2009, he has been an IARC Senior Visiting Scientist.
Christopher P. Wild arrived at IARC in 1984 with support from an IARC Postdoctoral Fellowship. After working as a scientist in the Unit of Mechanisms of Carcinogenesis, he served as the head of the Unit of Environmental Carcinogenesis (1994–1996). He returned as IARC Director in 2009.