Juan Daniel Mastretta Guzmán (born 1953, Puebla) is a Mexican engineer and designer. In 1987 he founded Mastretta Design, a design and automotive company. Mastretta was chiefly responsible for the development of the first Mexican sports car, the Mastretta MXT, in 2008.Daniel Mastretta trained in industrial design, and in his early career worked primarily in furniture and packaging design and in the design of public spaces. However, his primary work has been in the public transport sector.