In 1948, the battalion was re-raised as part of the Citizens Military Force, and was amalgamated with the 18th Battalion to form the 17th/18th Battalion (The North Shore Regiment). Upon reforming, the battalion was entrusted with the World War II battle honours of the 2/17th Battalion, in which many members of North Sydney Regiment had enlisted. The Australian Army was reorganised along Pentropic lines in 1960, and the battalion became 'B' Company, 2nd Battalion, Royal New South Wales Regiment (2 RNSWR). The battalion also formed the nucleus of 2 RNSWR's support company and regimental band. When the Pentropic divisional structure was abandoned in 1965, the battalion was reformed in its own right as the 17th Battalion, Royal New South Wales Regiment. This lasted until 1987 when another reorganisation of the Australian Army Reserve led to the unit's amalgamation to form the 2nd/17th Battalion, Royal New South Wales Regiment.