A tenured professor at the School of Fine Arts in his native country of El Salvador, Tadeo has shown throughout his country as well as throughout Latin America including Guatemala and Honduras with recent exhibits in Los Angeles and San Francisco. Specific exhibitions include the National Center for the Arts (CENAR, El Salvador), the Museum of Art of El Salvador, (MARTE), the Museum of Modern Art Guatemala, the Museum of Anthropology (MUNA, El Salvador), and SOMARTS in San Francisco.