Mariscotti is CEO and founder of Tomografia de Hormigón Armado S.A. After his PhD at the University of Buenos Aires, he spent a few years at Brookhaven National Laboratory. Later, he was visiting professor at the University of Manchester, KFA in Julich, Sao Paulo University, ILL at Grenoble and other institutions abroad. He was professor of nuclear physics at the University of Buenos Aires, member of the board of directors of the Buenos Aires Research Council, director of R and D at the Argentine Atomic Energy Commission and president of the National Agency for the Promotion of Science and Technology. He has been awarded the Konex Award (1983 and 2003), UNIDO (1995), and the Tech Museum Award (2002). He is a former president of the Argentine National Academy of Exact, Physical and Natural Sciences and a member since 1986.