Luc Dini is a French aerospace and defense engineer at Thales Air Systems and president of the 3af-sigma2 commission of the Association Aéronautique et Astronautique de France (3AF) since 2013. His commission focuses on UAP “hard observables” — physical traces, radar signatures, and multi-sensor data — as a methodological alternative to eyewitness-only reporting. He is a Roundtable 1 speaker at the June 29, 2026 French National Assembly parliamentary UAP colloquium.