| 1974 | Charles A. Black | |
| 1985 | William W. Marion | |
| 1989 | Kayleen A. Niyo, as Interim EVP | |
| 1990 | Stanley P. Wilson | |
| 1992 | Richard E. Stuckey | |
| 2001 | Teresa A. Gruber | |
| 2005 | Richard E. Stuckey, as Interim Advisor | |
| 2005 | John M. Bonner | |
| 2013 | Linda M. Chimenti | |
| 2015 | Kent G. Schescke |
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CAST, through its network of experts, assembles, interprets, and communicates credible, balanced, science-based information to policymakers, the media, the private sector, and the public.
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