Warcollier was born on 8 April 1881 at Omonville-la-Rouge in Paris.
In parapsychology, Warcollier first served as treasurer of the Institut Métapsychique International (1929-1938), then editor of its journal, the Revue Métapsychique, (1938-1940), and then as its president (1951-1962) [REF].