Marc E. Himbert, 60, is full professor of metrology in Cnam, Paris, and serves as scientific director of the joint laboratory in metrology (LCM) established between CNAM and LNE. He chairs the Laboratory section of the french accreditation body (COFRAC) and belongs to several national and international committees in scientific metrology (180 ref.). He is full member of the french Academy of technologies (NATF), and is an experienced trainer and expert in the field of uncertainty measurement.