Günter Grossmann received his BE degree in Mechanical Engineering in 1981 from the University of Applied Sciences in Winterthur, Switzerland. After his studies, he was employed as Materials Engineer in various companies. From 1989 until 1998 he worked in the Reliability Laboratory of ETH Zurich in the fields of reliability of electronic assemblies, especially of soft solder joints, and in production processes of electronic equipment. In 1998, Günter Grossmann was a scientific guest of the University of Queensland in Brisbane, Australia. Since 1999, Günter Grossmann has worked at the Swiss Federal Laboratories for Materials Testing and Research (EMPA) as a researcher in the reliability of electronic assemblies and components, as co-lecturer at ETH in "Physics of Failure and Failure Analysis" and in failure analysis. For more than 10 years, Günter Grossmann is involved in production and reliability of lead-free solders.

Christian Zardini was Professor of Electrical Engineering at the Ecole Nationale Supérieure d'Electronique, Informatique et Radiocommunications de Bordeaux. He was in charge of the 'Integration of power components and systems' group at IXL Laboratory (ENSEIRB-University Bordeaux 1). The group has successfully participated in several European and national projects: PROMETHEUS (S!), RAPSDRA (4th PCRD), HEIDI (PIDEA S!), HIRONDELLE (5th PCRD), CEPIA (PREDIT). In these projects, the group research interest focused on reliability studies of lead-free solder joints. In the European Lead Free Soldering Network (ELFNET), Prof. Zardini was responsible for the Components Technical Expert Group.