Dr. Oleg Dubovik specializes in the retrieval of aerosol properties from satellite, ground-based, and airborne remote sensing observations. Dr. Dubovik received his PhD from the Institute of Physics, Minsk, Belarus, in 1992. He worked in Japan for two years, participating in ADEOS/ILAS algorithm developments, and nine years in the USA at the GSFC/NASA research center. Since 2006, Dr. Dubovik has worked at the Laboratoire d'Optique Atmosphérique, Université Lille, France, as CNRS “Research Director”. The scientific accomplishments of Dr. Dubovik include: an aerosol retrieval algorithm for the AERONET federated network of ground-based radiometers; one of the pioneering climatologies of absorption and optical properties of ambient tropospheric aerosols; and popular, efficient software for modeling scattering by non-spherical aerosol particles. He focuses on the refinement of methodological aspects of numerical inversion for the needs of remote sensing by applying an elaborated statistical optimization approach. The developed principles were recently realized by the GRASP open source algorithm (https://www.grasp-open.com/) that can be applied to the retrieval of detailed aerosol properties from diverse observations, including both passive and active observations from satellites or ground (i.e., GRASP has been used for deriving an extended set of parameters from POLDER, 3MI/Metop, Sentinel -3, -4, 5p satellites, a combination of ground-based observations by lidar and radiometer)