He studied architecture at the National University and started a brilliant career assisting architect Mario Pani during projects as the new National Conservatory and the Latinoamericana Tower, both in Mexico City. However, he soon get interested with archaeologic excavations, due to the rich history of the soil in many areas where he was working as architect. Another element that influenced his first studies as archaeologist, was that during his childhood he spent many days exploring the old ruins of Teotihuacan, years before its reconstruction. Actually, Pareyón Moreno's father, colonel Eduardo Pareyón Azpeitia, was a friend of Manuel Gamio, whose work and personality had an impact during his first cultural development.
He returned to study at the National School of Anthropology, where he completed his master dissertation "Excavations at the archaeologic zone of Cerro del Tepalcate" (1961).