Landon D. C. Elkind (Assistant Professor of Philosophy, Department of Political Science, Western Kentucky University) is director of the PM-MATS project. He began the larger Principia Rewrite project in September 2020. He has co-edited two volumes The Philosophy of Logical Atomism: A Centenary Reappraisal (2018) with Gregory Landini and Russell, Feminism, and Women Philosophers in His Circle (2024) with Alexander Klein. His invited contributions include chapters in The Oxford Handbook to Bertrand Russell (Samuel Lebens, Fraser MacBride, and Graham Stevens (eds.): Oxford University Press) and Historiography, Methodology, and the Canon (Sandra Lapointe and Erich Reck (eds.): Routledge). He is currently working on a new edition of Principia for Cambridge University Press (Principia Mathematica: A Textual Edition, Volume I projected for 2025).

Gregory Landini (Professor, Department of Philosophy, University of Iowa) is a collaborating scholar. He has research interests in philosophy of logic, metaphysics, modal logic, foundations of mathematics, philosophy of mind, philosophy of language, and the history of analytic philosophy. He has published many articles in history of early analytic philosophy, including work on Whitehead and Russell's Principia Mathematica, Gottlob Frege's Grundgesetze der Arithmetik, philosophy of logic, and metaphysics. He co-edited (with Elkind) the collection The Philosophy of Logical Atomism: A Centenary Reappraisal (Palgrave Macmillan, 2018). He has authored five monographs: he is currently writing a sixth book, Principia Mathematica Redux, which explains and defends Whitehead and Russell's Logicism.

Matthew Butler (Research Manager, Digital Scholarship and Publishing Studio, University of Iowa) is a collaborating scholar. He works on such projects as DIY History and the International Dada Archive. Currently he is collaborating with David G. Stern (Professor, Department of Philosophy, University of Iowa) on the University of Iowa Tractatus Map, visualizing Stern's scholarly edition and new translation of the Tractatus Logico-Philosophicus as an engaging and interactive digital subway-style map. He is an MFA graduate and former Bodine Fellow in the Intermedia Program in the School of Art and Art History at Iowa. With over 20 years of professional experience in libraries, Matthew has collaborated with dozens of humanities scholars to integrate emerging technology with their research and publications. He also teaches digital art and computer programming courses at Coe College, Mount Mercy University, St. Xavier University, and the University of Iowa.