Biostatistician at eXYSTAT since January 2019, Constant Josse initially trained as an engineer in applied mathematics at the National Institute of Applied Sciences (INSA) of Rennes, with the aim of moving through his experiments towards statistics and in particular biostatistics. He completed his internship in 2018 in the field of intestinal microbiota at Biofortis in Nantes, before joining eXYSTAT and discovering another application of health statistics: clinical research and epidemiology studies. Since his arrival at eXYSTAT, Constant writes statistical analysis plans and programs these analyses on SAS.