William Marcellino

William Marcellino
Senior Behavioral and Social Scientist; Professor of Policy Analysis, Pardee RAND Graduate School
Washington Office


Ph.D., Carnegie Mellon University

Media Resources

This researcher is available for interviews.

To arrange an interview, contact the RAND Office of Media Relations at (310) 451-6913, or email media@rand.org.

More Experts


Bill Marcellino is a senior behavioral scientist at RAND, professor of text analytics at the Pardee RAND Graduate School, and lecturer at Carnegie Mellon University and Johns Hopkins University. He was trained as a sociolinguist and corpus linguist, and at RAND he develops AI applications, including RAND-Lex, RAND's proprietary text analytics suite. Marcellino teaches text analytics & natural langauge processing (NLP), as well as qualitative research methods. His research focuses on information as a warfighting function, AI technology application & acqusition for DoD, military resilience, and misinformation/disinformation & conspiracy theories over social media. He also helps lead RAND's AI development in speciality LLMs and LLM-enabled applications. 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.

Pardee RAND Graduate School Courses

Recent Projects

  • Will to Fight
  • Defending Against and Mitigating the Effects of Disinformation
  • Army Contract Analytics Capability Development
  • RAND Corporation Conspiracy Theories Research
  • Army Specific LLM/Chatbot

Selected Publications

Marcellino, William, Todd C. Helmus, Joshua Kerrigan, Hilary Reininger, Rouslan I. Karimov, and Rebecca Ann Lawrence, Detecting Conspiracy Theories on Social Media: Improving Machine Learning to Detect and Understand Online Conspiracy Theories, RAND Corporation (RR-A676-1), 2021

William M. Marcellino, "Talk like a Marine: USMC linguistic acculturation and civil-military argument," Discourse Studies, 16(3), 2014

Christopher Paul & William M. Marcellino, Dominating Duffer’s Domain: Lessons for the 21st Century Information Operations Practitioner, RAND Corporation (RR-1166), 2017

William M. Marcellino, "Revisioning Strategic Communication Through Rhetoric & Discourse Analysis," Joint Forces Quarterly, (76), 2016

Kavanagh, Jennifer, William Marcellino, Jonathan S. Blake, Shawn Smith, Steven Davenport, and Mahlet G. Tebeka,, News in a Digital Age: Comparing the Presentation of News Information over Time and Across Media Platforms., RAND Corporation, (RR-2960), 2019

Marcellino, William, Smith, Meagan, Paul, Christopher, & Skrabala, Lauren., Monitoring Social Media: Lessons Learned for Future Department of Defense Social Media analysis in Support of Information Operations, RAND Corporation (RR-1742)

Posard, Marek N., William Marcellino, Todd C. Helmus, and Katie Feistel, A House Reunited: Prospects for Bipartisanship in a Divided Country, RAND Corporation (PE-A2285-1), 2023

Johnson, Christian, William Marcellino, Bad Actors in News Reporting: Tracking News Manipulation by State Actors, RAND Corporation (RR-A112-21), 2021

Recent Media Appearances

Interviews: BTRtoday; CNHI News Service Online; Fox; WORT FM; The World and Everything in It