1948 – Mr. S. Mizzi
1949 – Professor J. Anastasi Pace; Mr. F.E. Amato Gauci
1959 – Mr. John F. Axisa
1960 – Mr. Joseph M. Rossignaud
1965 – Mr. Joseph Lungaro Mifsud; Mr. A. Castillo
1970 – Mr. E. Vassallo
1974 – Mr. A. Farrugia
1976 – Mr. F.S. Carbone
1984 – Mr. Emanuel Cilia Debono
1999 – Mr. Frank Pullicino
2005 – Dr. Noel Vella
2015 - Ms. Sandra Gatt
2019 - Ms. Diane Vella Muscat (Director General)