The Reactor Section of the Scientific Council of the First Chief Directorate of the NKVD, in May, assigned Leipunski and Laboratory V the tasking to develop nuclear reactors with beryllium as a neutron moderator. Later, Laboratory V was charged with the development of a gas-cooled reactor using enriched uranium and beryllium as a moderator. Laboratory V was also assigned tasking for the studies of radiation biology and separation of radio isotopes, similar to the tasking given Nikolaus Riehl's Laboratory B in Sungul'. Other personnel in Pose's Laboratory V were Wolfgang Burkhardt, Dr. Baroni, Dr. Ernst Busse, Dr. Hans Keppel, Dr. Willi Haupt, Dr. Karl-Heinrich Riewe, Dr. Eng. Herbert Thieme (formerly with Nikolaus Riehl at Plant No. 12 in Ehlektrostal'), Dr. Hans Gerhard Krüger (formerly with Gustav Hertz at Institute G), Dr. Helene Külz, Dr. Hellmut Scheffers, and Dr. Renger. In 1952, most of the German scientists left Laboratory V for a facility in Sukhumi, where they remained in quarantine until returning to Germany in 1955. However, Pose remained at Laboratory V until 1955, when he then went to the Laboratory for Nuclear Problems, now the Joint Institute for Nuclear Research, in Dubna. In 1957, while still at the Joint Institute for Nuclear Research, Pose became a professor for special areas of nuclear physics at "Technische Hochschule Dresden". In 1959 Pose returned to Germany and settled in Dresden, East Germany. In addition to continuing his teaching at the "Technische Hochschule", he became the first director of the "Instituts für Allgemeine Kerntechnik" (Institute for General Nuclear Technology), whose chair for Neutron Physics of Reactors he also took over. At the same time, he became Dean of the Faculty for Nuclear Technology, which was created in 1955. After closing the Faculty for Nuclear Technology in 1962, Pose transferred to the directorship of the "Institut für experimentelle Kernphysik" (Institute for Experimental Nuclear Physics) and the teaching chair of the same name at the "Technische Hochschule". He held these positions until 1970. At the close of World War II, Pose's brother, Werner, was a prisoner of war of the Russians. Pose arranged for Werner to be transferred to Obninsk and he employed Werner as a technician in Laboratory V.