F. Dutton. 1911 -1920
P. Anderson. 1920 - 1927
S. Starkey. (Acting) 1922 - 1929
T. Watson. 1929 - 1931
S. Starkey. 1932 - 1941
H.W. Jackson. 1941 - 1954
P.L. Blignaut. 1954 - 1978
C. Badenhorst. 1978 - 1985