As engineer in the Laboratory of Glaciology and Geophysics of the Environment (LGGE / CNRS), I am responsible of the nuclear equipment, the radioactivity measurements (snow/firn/ice, sediment/soil and atmosphere) and the data interpretation. The main topics are related to snow Surface Mass Balance, accumulation rates (lacustrine environment) and radionuclide (natural and man-made) inventories studies. I also manage field campaigns in polar areas (Antarctic and Arctic).