Waldo Aguiar trained at the San Fernando School of Fine Arts, where he developed a foundation in academic drawing and later served as a professor of drawing. A painter, sculptor, and printmaker, he cultivated an expressionist style of figurative art with a particular focus on the human figure and, especially, the female form.

Aguiar was a corresponding member of the Royal Academy of Fine Arts of San Fernando, an affiliation that reflected his standing within the Spanish artistic community. He exhibited at several venues, including the Círculo de Bellas Artes in Madrid, a central institution for mid-century Spanish artists. His work entered significant public collections, among them the Museo Reina Sofía and the Museo de África, co...