Career
He represented the South Australian House of Assembly seat of Light from 1970 to 1993. He would later serve a second stint as mayor from 1993 to 2000. Eastick led his party to the 1973 and 1975 elections, losing both to the Don Dunstan-led South Australian Branch of the Australian Labor Party.
His term as leader saw the LCL, the state"s main conservative party since 1932, formally reconstruct itself as the South Australian Division of the Liberal Party of Australia, though a separate state Country Party had been reformed in 1963.
As such, he was the only LCL leader to have never served as Premier. Eastick also served as Speaker of the South Australian House of Assembly when his successor as South Australia Liberal leader, David Tonkin, served as Premier from 1979 to 1982.