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On graduation, Gy worked as a chemical engineer for CMCF , Congo, before returning to Paris in 1949 as a research engineer for the mining and processing trade organisation Mineraux et Metaux . It was during this time that Gy began to address fundamental issues in sampling, especially those concerned with characterising industrial bulk chemicals, aggregates and chemical processes. Gy became head of the mineral processing laboratories and, by 1962, technical manager, during which time he continued to develop his sampling theory, usually articulated in terms of the seven sampling errors . Since 1963 he has worked as an industrial sampling consultant.
Gy received doctorates in physics ( 1960Events January-February January 1 Independence of Cameroon January 9 Aswan High Dam construction begins in Egypt January 11 Chad declares its independence. January 14 Ralph Chubb, the gay poet and printer, dies at Fair Oak Cottage in Hampshire. January 23) and mathematicsMathematics is commonly defined as the study of patterns of structure, change, and space; more informally, one might say it is the study of "figures and numbers". In the formalist view, it is the investigation of axiomatically defined abstract structures ( 1975Events January January 1 Watergate scandal: John N. Mitchell, H. Haldeman, John D. Ehrlichman are found guilty of the Watergate cover-up and are sentenced to 30 months to 8 years in jail on February 21 January 5 The Tasman Bridge in Tasmania, Australia, i) from the University of Nancy but has always worked outside the academic mainstream, publishing 9 books and over 175 papers, including: