Mendoza received his M.A. in Sculpture from the Royal College of Art, London.
In Venezuela, he was the head of the Department of Restoration and Conservation of Sculpture at the Galería de Arte Nacional. He taught at the Escuela de Artes Plásticas Cristóbal Rojas in Caracas, Venezuela, where he served as head of the Sculpture School from 1984 to 1999. He was president of the National Association of Young Sculpture.
He has participated in several solo and group exhibitions, including the Conac Gallery, the V National Salon of Young Artists, Venezuela, the VII National Biennial of Visual Arts, Galería de Arte Nacional, XLII, XLIII and XLIV Arturo Michelena Hall, Galería Oro Negro, Venezuela, the 8th Small and Medium Sculpture Triennial, Budapest, which was part of an exhibition that later went to Bucharest, Belgrade, Reykjavik, Stockholm, Vienna, Paris and The Hague, Summit Public Art 2022, New Jersey, among others.
He has received multiple awards, including the Julio Morales Lara Awards and the Arturo Michelena Hall of Valencia. Sculpture Award, Aragua Hall. National Encounter of Sculptors Award Fundarte. Caracas Metro Award and II Prize Francisco Narváez Sculpture Biennial. Special mention in the Sculpture Hall. His work is in the Art Museum of Maracay, Aragua; Andrés Pérez Mujica Open Air Museum and Ateneo Collection, Valencia; Minas de Aroa National Park, Yaracuy, and the Museum of Contemporary Art of Zulia, Maracaibo, among others.
He currently lives in New York and teaches sculpture at The New York School of the Arts.