M. A. Bernal is Nuclear Engineer graduated Summa Cum Laude at the High Institute of Nuclear Science and Technologies, in Havana, Cuba (1995). He obtained a Master in Medical Physics degree at the Venezuelan Institute for Scientific Investigation (2003, sponsored by the IAEA). Afterward, he got a Doctorate in Physics at the Simon Bolivar University (USB) in Venezuela, Graduated with Honours. He worked as Medical Physicist for more than 6 years before coming to the academic environment. He was professor of Medical Physics for one year at the School of Physics of the Central University of Venezuela (2006-2007) and Assistant Professor of Physics at the USB since September 2007 until February 2011. He has been working on radiation transport Monte Carlo simulations since 1993 and was Invited Researcher at the Radiological Sciences Lab, Universidade do Estado do Rio de Janeiro since February, 2010 until January, 2011. During two years, he remained as Visiting Professor of Physics at the Gleb Wataghin Institute of Physics, State University of Campinas (UNICAMP), in Brazil, where he is now Associate Professor of Physics.