Abstract :
Juan Antonio Rubio began his career as an intern of the former JEN (Spanish Nuclear Energy Board) in 1965. He continued his training as at CERN in 1968. In the early days of democracy in Spain, he was appointed Head of the Nuclear Physics and Elementary Particle Division of the JEN. His experience enabled him to join one of the most exciting experiments at the time - the MARKJ in DESY under the direction of Nobel Prize winner Samuel C.C. Ting. In 1983 he was appointed Director of Basic Research and later Scientific Director at JEN. From this position, he promoted diversification of the Center, which ultimately became CIEMAT (Center for Research on Energy, Environment and Technology), to perform research in technological fields other than nuclear power, such as renewable energies, magnetic confinement fusion, environment, and information technologies. It was at this time that his Group joined the proposal for the L3 experiment at the LEP particle accelerator at CERN. In 1987, he joined CERN as a senior researcher, CERN Group leader for L3 and Scientific Advisor to the then Director General and Nobel Prize winner, Prof. Carlo Rubbia. He contributed to the original program of the LHC (Large Hadron Collider), was appointed coordinator of CERN and the World Laboratory for Latin America, and continued to take part in the L3 experiment.