[4] A frequent contributor to Canadian Architect Magazine and ARQ Architecture Québec, photographic expositions of his work were also held in public institutions in Bogotá, Vancouver, Toronto, Ottawa, Montreal and Quebec City.
[5] Inspired by his uncle, architect Dicken Castro,[6] he enrolled in architecture at the Universidad de Los Andes where he was taught by Rogelio Salmona.
There he was taught by Robert S. Harris, a proponent of participatory design, and worked during the summers of 1973-75 in the Campus Planning Office where Christopher Alexander's Pattern Language was implemented as The Oregon Experiment.
[8] Following the publication of Arthur Erickson: Critical Works, Castro curated the accompanying exhibition at the Vancouver Art Gallery, held from June to September 2006.
In 2007 Castro was also appointed Associate Director of the Masters of Architecture (M. Arch) Professional Program at McGill University, a position he held until 2011.
[14] More recently Castro included W. G. Sebald's "concept of the extraordinary" in A Taxonomy of Collecting,[6] an analysis of collages by John A. Schweitzer exhibited at the University of Western Ontario in 2014.
[15] In Syndetic Modernisms, Carlos Rueda Plata wrote that both "syndesis and thaumaturgy (the marvelous)" informed Castro's analysis of the ceremonial path of Punta Pite, Chile.
Recognized for excellence in architectural journalism, he was awarded the 1990 Prix Paul-Henri Lapointe in the category "History, Criticism and Theory" by the Ordre des architectes du Québec.
[4] Castro was awarded grants by the Canada Council and the Graham Foundation for Advanced Studies in the Fine Arts to research Rogelio Salmona.