René Brun

René Brun joined CERN in 1973. While working with C. Rubbia at the ISR he developped the HBOOK package. In 1975 he was in charge of the simulation and reconstruction software for NA44 where GEANT1 and GEANT2 were created. In 1981, he joined OPAL at LEP, creating the GEANT3 detector simulation system, also pioneering the introduction of the first workstations like Apollos in Europe. In 1984 he coordinated the development of the PAW (Physics Analysis Workstation) data analysis system and until 1994 he was in charge of the Application Software group in the computing division. In 1995 he created the ROOT system while working for the NA49 heavy ion experiment at the SPS. Rene has been leading the ROOT project from 1995-2011. Rene is still active and following his retirement he has the chance to work on his own project on Physics models.