Ryan Kasak is an Assistant Professor of Linguistics at the University of Oklahoma. He received his PhD in Linguistics from Yale University in 2019 with his dissertation providing a theory-motivated explanation for the ordering of verbal morphology in Mandan. His primary research focus has been Mandan since 2010, though he also researches the historical development of the Siouan language family and reconstruction of Proto-Siouan more broadly. In addition to Mandan, he has worked on language documentation efforts for the Hidatsa and Crow languages. His theoretical interests include language description and documentation, historical linguistics, phonology, and morphology.