She has worked, for decades, on the Maya civilization, both in prehispanic and colonial times, specifically in Belize.
[1] She particularly focuses on how human occupation (domestic and industrial waste, burials, abandoned houses and processing sites) influences soil formation and production.
Graham directs excavations at Lamanai on the New River Lagoon in Belize, and at Marco Gonzalez, on Ambergris Caye.
[1][4] Recent work has focused on mission churches from the early Spanish colonial period.
[7] Graham has written on Mesoamerican archaeology in the Guardian,[8] Apollo Magazine,[9] and the Conversation.