The Rockets had its humble beginnings during 1966. On the 24th July that year, the founder Mr Dimitar Mikulasev (better known as "Dimi") formalised the club called "Hills Independent Sports Club". Dimi held the office of Club Secretary from 1966 through to 1972, Sports Manager for many years and Club President from 1989 through 1990.

One of the club's key philosophies has been to provide sporting opportunities to the young children of the Hills district and this was evident in the Rockets' early years where for no fee, the club provided places to children from Marella Mission, St Michaels Boys Home and the Charlton Boys Home.

The club originally had no "playing name". However, in 1971 the then Chairperson of the Ladies Axillary (Social Club) suggested the name "Rockets". The name was adopted by the Ladies Auxiliary and was ultimately approved by the full committee of the club.

The Rockets' first home ground playing field was at Greenup Park in Castle Hill. Greenup was the first public playing field in the district and was established by Dimi with Baulkham Hills Shire Council. The Rockets outgrew this venue and later moved to our current home ground at Eric Mobbs Reserve.

The club affiliated itself with the Castle Hill RSL and subsequently changed its name to the "Castle Hill RSL (Rockets) Soccer Club Inc.", now celebrating over 36 years in the provision of fun sporting activity through competition and non-competition soccer for all ages, male and female.

The current club colours are royal blue and white, however the original strip was black and gold.