Like his father and grandfather, Cachia also worked in the construction of the Żejtun Parish Church.

[3] He was also an adjutant within the Żejtun militia while Malta was ruled by the Order of St.

[4] Cachia took part in the Maltese uprising of 1798–1800 against the French occupation of Malta.

217 notebooks which contain information about the city in the late 18th and early 19th centuries have survived, and 211 of these were in the personal archive of architect André Zammit[5] after he had discovered them in a house in Lija in around 1990.

After Zammit's death in 2020, his family donated the collection of manuscripts including Cachia's work to the National Archives of Malta in 2022.