 From 1955 to 1959 was assistant of Alfonso Caso during excavation and register works in archaeological sites in Quiotepec, Tecomavaca, Los Cues, and Cuicatlán, Oaxaca.In 1959 was named director of the Museum of Popular Arts at Pátzcuaro, Michoacán.Around 1960 Pareyon was exploring and mapping archaeological sites in the low basin of the Balsas River, at El Infiernillo Dam.