His research interests are in the archeology of western North America, especially land-use practices, tool-stone and cook-stone technology, and cultural resources management. His fieldwork in Texas spans more than 30 years, during which time he has worked closely with avocational archeologists, Native American groups, Civil War enthusiasts, and local historical organizations. Thoms is a fifth-generation Texan whose archeological interests date to his grade-school days in the Texas Panhandle when his father taught him how to find Indian campsites around playa lakes and along draws.