The article deals with the issues related to the legal status of researchers involved in the implementation of “megascience” class projects. Scientific organizations and universities lack certain independence when determining the qualifications requirements for the hiring of scientific workers. There are some terminological problems, difficulties in undergoing preliminary medical examination procedures in the recruitment process, difficulties with obtaining certificates of the presence (absence) of a criminal record and (or) the fact of criminal prosecution or on termination of criminal prosecution on exonerating grounds. Based on an analysis of the existing problems, the author concludes that it is necessary to make comprehensive changes to the current legislation aimed at improving the legal regulation of engaging researchers in the implementation of large “megascience” class projects, taking into account the peculiarities of their work.