Subsequently, he spent twelve years in Europe, six of them as a Staff Member of the European Laboratory for Particle Physics (CERN) in Geneva, and the remainder as a research associate at the University of Berne, University of Dortmund, and at the Max Planck Institute in Munich.
Following this period, he spent twelve years in Europe, working six years as a Staff Member at CERN in Geneva and the remaining six years as a research associate at various institutions such as the University of Berne, University of Dortmund, and Max Planck Institute in Munich.