Andrii Sukhorukov finished in 2013 his PhD thesis at the Main Astronomical Observatory (Kiev, Ukraine), on “Formation of the Si I Line Intensity Profiles in One-Dimensional Models and a Three-Dimensional Model of the Sun”. From 2014 till 2017 he worked as post-doctoral fellow at the Institute for Solar Physics and Astronomy Department of the Stockholm University, where he developed a three-dimensional radiative transfer code for modeling the intensity profiles of spectral lines taking into account partial frequency redistribution phenomena. Since October 2017 he works at the IAC as Severo Ochoa post-doctoral fellow. Given his strong interest on expanding his radiative transfer expertise to the field of spectropolarimetry, since January 2018 he is an active member of the POLMAG research team. Andrii is working on the research described below in WP-5. He also participates on the development of WP-6.