Physicist.
Pierre Curie (15 May 1859 – 19 April 1906) was a French physicist, a pioneer in crystallography, magnetism, piezoelectricity and radioactivity. In 1903 he received the Nobel Prize in Physics with his wife, Marie Salomea Skłodowska-Curie, and Henri Becquerel, "in recognition of the extraordinary services they have rendered by their joint researches on the radiation phenomena discovered by Professor Henri Becquerel".
Source:
1.) Warren Allen Smith (2000). Who's who in hell: a handbook and international directory for humanists, freethinkers, naturalists, rationalists, and non-theists. Barricade Books. p. 259. ISBN 9781569801581. "Curie, Pierre (1859—1906) A codiscoverer of radium, Pierre Curie was an atheist."