Mordó joined the organizing committee as the Secretary that was chaired by Antonio Gallego Burín, the general director of Fine Arts, with vice-president Joan Ainaud de Lasarte, the director of the Museums of Barcelona, José Luis Fernández del Amo, the director of the Museum of Contemporary Art. In addition to Secretary of the organizing committee of the exhibition, Mordó, was the time coordinator. In this role, Mordó managed numerous details to facilitate the realization of the project which culminated in the assembly of the works. Through this project she built a wealth knowledge and experience about mounting an exhibition. In 1958, the gallery owner Aurelio Biosca was looking for someone to run his gallery and met Mordó. The gallery showcased artists of and the generation of the great Spanish informalism in which Mordó curated some very influential exhibitions. Encouragement from Mordó's artist friends and colleagues gave her the confidence to open her own gallery. Mordó formed the gallery with Ernesto Wuthenow, María Luisa Maristany and José Ayllón. The Juana Mordó gallery was located on Villanueva Street No. 7, and opened on March 14, 1964. It was inaugurated with a group exhibition of artists: Vicente Ameztoy, Amalia Avia, Jaime Burguillos, José Caballero, Rafael Canogar, Eduardo Chillida, Enrique Gran, José Guerrero, Carmen Laffon, Antonio Lopez Garcia, Julio Lopez Hernandez, Francisco Lozano, Manolo Millares, Manuel Hernández Mompó, Lucio Muñoz, Gaston Orellana, Alejandro Kingdom, Manuel Rivera, Juan de Ribera Berenguer, Luis Sáez, Antonio Saura, Eusebio Sempere, Pablo Serrano, Antonio Suarez, Antoni Tapies, Gustavo Torner and Fernando Zobe. In December 1975, with Manuel Mendoza, Mordó opened a new gallery on Calle Castelló, number 7. In the late 1960s Mordó started a long-term collaboration and friendship with the gallery owner Margarete Lauter in Mannheim. Thanks to this cooperation, Lauter was able to give Spanish contemporary art a platform in Germany. On June 27, 1983, King Juan Carlos presented Mordó with the Gold Medal of the Fine Arts at the Prado Museum. A few months later she died in Madrid on March 12, 1984.