A lifetime instrument maker, starting from the laser of his thesis in Pisa, then for 15 years in High Energy Physics (CERN and Cornell Lab for Nuclear Studies), finally 25 years on Gravitational Waves, on mechanical design of GW detectors (Virgo, TAMA, KAGRA and parts of LIGO), initially on seismic isolation, then on dissipation mechanisms and thermal noise in dielectric coating mirrors, the limiting factor of GW detection. Presently make a living developing sensors for FB, and work on coatings and GW developments as a personal hobby, with 3-4 students.