FEMTO Engineering is a hyperfrequency engineering center. It markets ULISS, an ultrastable cryogenic oscillator holding the world record for frequency stability. Its many applications include geodesy, space navigation, radio astronomy, metrology and industrial oscillator qualification. FEMTO Engineering’s activities are an extension of the research activities of the FEMTO-ST Institute, one of the major research institutes attached to the CNRS, operating in the field of engineering sciences, with some 750 members. With a dozen technology platforms, including a micro-nano-fabrication center, its research is often highly experimental, with numerous interactions with industry. A component of CARNOT Telecom & Société Numérique, FEMTO Engineering has been accredited since July 2016 for its vocation to conduct research in partnership with companies.