Marcellino briefed journalists in September 2021: Russian Disinformation 2021.

William Marcellino is a senior behavioral scientist at the RAND Corporation, professor of text analytics at the Pardee RAND Graduate School and lecturer at Johns Hopkins University. He was trained as a sociolinguist and corpus linguist, and at RAND he develops analytic toolsets, including RAND-Lex, RAND’s proprietary text analytics suite. Marcellino teaches text analytics methods for big datasets (e.g. social media), as well as qualitative research methods. His research focuses on information as a warfighting function, intelligence, military resilience, counter-violent extremism/terrorism and social media as a data source. He has also served as a U.S. Marine tank officer and enlisted rifleman. Marcellino received his Ph.D. in rhetoric from Carnegie Mellon University.