Andrea Sosso was educated as an electronic engineer (with a penchant for physics) and holds a Ph.D in Metrology. Though invariably attracted by the cross-disciplinary character of measurement sciences, he mainly focused on the development of (mainly) quantum standards for electrical voltage metrology. After one year spent at NIST to work in the maintenance and dissemination of the Volt and in the applications Josephson effect, he designed the Josephson standard in Italy then operated it for more than two decades to maintain the primary Volt. Many of his efforts have been targeted at realizing a practical He-free Josephson standard through the development of suitable fabrication technologies with high and low temperature superconductors as well as by improving cryogenic techniques and measurement methods. Most of the rest he spent in the chores of a conscious metrologist: refining technical procedures and calibration accuracy for customer and quality system satisfaction; improving workplace safety; taking part in international comparisons supporting CMCs and in projects supporting research; teaching, public engagement. His duties as referee for many scientific journals and research projects, along with participation in technical experts panels for industry and coordination of international working groups took a non negligible part of his time, rewarded by a great pride for serving in these roles. Besides, a bunch of topics sparked his interests over the years, like: fundamental physical constants; capacitive sensors for microscopy; dc an ac Quantum Hall Effect; Josephson and Hall devices modelling and, more recently, quantum optics. He has written more than 200 scientific research publications, contributions, technical procedures, books on subjects including: electrical and mechanical metrology; electronics; applied physics; science communication and holds 4 patents.
