Menchaca-Rocha is a Mexican nuclear physicist with an Oxford D.Phil. and postdoctoral training at LBNL. His interests include heavy-ion reaction mechanisms and their hydrodynamic simulation; the production of light nuclei and antinuclei, with applications to cosmology. He is member of important international collaborations such as ALICE and AMS2. Locally, he pioneered muon-imaging, carrying highly visible applications to the Teotihuacan Pyramid of the Sun and to the Popocatepetl Volcano. He has published 237 papers, cited over 20,000 times (H=75). Directed (2003-07) the UNAM Physics Institute of Physics; presided over the Mexican Academy of Sciences (2010-12); and is (2016-19) General Coordinator of the Science Advisory Council to the Mexican Presidency. Among other distinctions, in 2004 he received the National Science Prize, the highest academic honor in Mexico. Emeritus, National Researchers System since 2017