Catholic clergy scientists

José María Albareda Herrera (Caspe, 15 April 1902 - 26 February 1966, Madrid) was a Spanish soil scientist and science administrator. From its 1939 creation by Francoist Spain to his 1966 death, he was the secretary general and head of the Higher Council of Scientific Research (CSIC), the main Spanish scientific institution.
He was one of the first numerary members of the Opus Dei (from 1937) and was a close friend of its founder, Josemaría Escrivá. He was ordained a priest in 1959. In 1960, he was appointed the first president of the University of Navarra.

Fernando Ocáriz Braña (born 27 October 1944) is a priest of the Catholic Church who has been the prelate of Opus Dei since 2017. Ocáriz is the fourth person to head Opus Dei since its founding in 1928. He is widely published in philosophy and has been a consultor of the Congregation for the Doctrine of the Faith since 1986.

Jean Baptiste Carnoy (11 January 1836 – 6 September 1899), born in Rumillies (Belgium), was a Roman Catholic priest and a scientist in the field of cytology. He made the initial explanation of the real nature of the albuminoid membrane, and conducted noted experiments on cellular segmentation.