Casey completed an M.A. in history at the University of Utah where she studied comparative colonialism in the early modern world. Her M.A. thesis explored Caribbean contraband trade networks of the eighteenth century; focusing specifically on the conflict surrounding the War of Jenkins' Ear and the siege of Cartagena de Indias. Her dissertation examines the development of early seventeenth-century English and French colonies in the Caribbean, looking specifically at the islands of Saint Christopher, Tortuga, and Jamaica.