Native of Chicoutimi, Catherine Tremblay has lived and worked in Montreal since 2004. She holds a master's degree in visual and media arts from UQAM, a bachelor's degree in Fine Arts from Concordia University and is currently completing a bachelor's degree in graphic design at UQAM. Over the last few years she has done a number of research and creative residencies, notably at the École nationale supérieure d’art de Nancy, in France (2005); at Le Fresnoy – Studio national des arts contemporains, also in France (2009); at Séquence (today the Bang Centre) in Chicoutimi (2013); at Action Art Actuel in Saint-Jean-sur-Richelieu (2014); and at the Centre d’art de Kamouraska in the Lower St. Lawrence (2015). Since 2005 her work has received numerous awards and been presented in collective and solo exhibitions throughout Québec, in Switzerland, in Africa, and in New York for the Montreal/Brooklyn project.

Actively involved in her community, she has been production director for Les Rencontres internationales de la photographie en Gaspésie since 2015. She was also co-president of L'imprimerie, center d'artistes, from 2016 to 2021. Organization that was founded by the mutualisation of Cabinet, espace de production, an organization she co-founded in 2012, and Atelier Graff. She teaches visual arts, graphic design and photography at Cégeps André-Laurendeau and Saint-Jérôme.