Ramensky was released after serving a sentence in Peterhead Prison in 1943. During his time there he had written to various officials seeking references to join the army. Due to the intervention of a senior police officer from Aberdeen he had attracted the interest of Robert Laycock who was seeking people with skills which could be used in commando raiding forces. As a result, he was enlisted with the Royal Fusiliers in January 1943 and transferred immediately to the Commandos, where he was trained as a soldier whilst also instructing on the use of explosives. Although being officially enlisted with the Royal Fusiliers he never actually served with them, spending his entire wartime service with the 30 Commando.