In 1972, the MINDEF decided to allow full-time national servicemen (NSFs) to join the unit. The first NSF batch of commandos formed a second company on 15 January 1973 with CPT Gwee Peng Hong as its Officer Commanding (OC) and Second Warrant Officer (2WO) Khiong Kian Khoon as its Company Sergeant Major (CSM). From July 1973 to January 1975, the third, fourth and fifth companies were formed and were respectively led by CPT Boon Hon Lin, CPT Lim Siang Tong and Lieutenant (LTA) Dominic Teo. A sixth company was formed with 2005, with CPT Arnold Low as its OC and 2WO Kasinathan as its CSM.