Park is co-editor of Mormon Studies Review, a member of the executive committee of the Mormon History Association, editor the Mormon Studies ' Series for Fairleigh Dickinson University Press, member of the editorial board of the Journal of Mormon History, a founder and editor of The Junto: A Group Blog on Early American History, a founder and co-editor of the Patheos.com column Peculiar People, member of the editorial board of ', a founder and contributing editor at Juvenile Instructor: A Mormon History Blog. A review of Park's American Nationalisms in Journal of the Early Republic said, "Park’s ambition is the source of this book’s strengths and of most of its shortcomings"; and, a review in Journal of American History said that Park "argues that the Revolution severed the one thing Americans had in common, that they were subjects of the British Crown. The lack of definition in American nationhood fostered grave anxieties for the country's future. To fill the gap and unify the citizenry, thinkers in the early republic cultivated particularist visions of American character and destiny and projected them onto the country as a whole. These notions were regionally grounded." It was a finalist for Johns Hopkins University Press's Sally and Morris Lasky Prize for Political History. Kingdom of Nauvoo is described in Publishers Weekly as Park's "fastidiously researched" telling of the Latter Day Saints "'kingdom of Nauvoo' in western Illinois. Park, who was given extensive access to the Mormon Church’s archives, entertainingly establishes this little-known Mormon settlement’s proper place within the formative years of the Illinois and Missouri frontier." According to its Kirkus review, the aspirations of the Latter Day Saints that Park documents in the book "involved a repudiation of the Constitution in favor of a document called the Council of Fifty, which, , 'rejected America’s democratic system as a failed experiment and sought to replace it with a theocratic kingdom.'" During 2014 a book review by Park catalyzed some controversy among the Mormon apologetics community. Within his review, Park advocated for the robustly secular framework of 19th-century historical studies within which to engage the greater religious studies academy with regard to Book of Mormon studies. In 2017, Park joined twenty other Mormon studies scholars in signing a friend-of-the-court brief filed with the U.S. Supreme Court with regard its review of Trump Administration's travel bans. The brief draws parallels between historical U.S. government-promoted anti-Mormon sentiments and the allegedly anti-Muslim atmosphere of the proposed bans. In 2017 Park was among and ten co-authors publishing "Shoulder to the Wheel: Resources to Help Latter-day Saints Face Racism..."
