兵営人民警察
After the foundation of the German Democratic Republic Lenski was formally acknowledged as a "Victim of Fascism"" in October 1949 and became a member of the council of the National Democratic Party of East Germany (NDPD) in May 1950. Between March 1951 and July 1952 Lenski worked at the municipal administration of Berlin. Starting on 1 August 1952 he joined the staff of the East German paramilitary Kasernierte Volkspolizei (Barracked People's Police) and was responsible for the configuration of tank troops. On 28 April 1953 he was promoted to Commander of Tank Troops ("Chef der Panzertruppen") at the "Department of National Defence" at Strausberg and became a major general of the National People's Army after its foundation.