Below is a list of all of the Secretaries of the Royal College of Science Association from our first Secretary, T L Humberstone in 1909, to the current Secretary.
| 1909-1919 | T. L. Humberstone. |
| 1919-1923 | Professor J. W. Hinchley. |
| 1923-1933 | W. E. King |
| 1933-1938 | Dr. H. J. T. Ellingham. |
| 1938-1948 | Assistant Professor H. R. Hewer. |
| 1948-1956 | Dr. B. Atkinson. |
| 1956-1957 | J. Ford. |
| 1957-1959 | J. F. Herringshaw. |
| 1959-1966 | W. L. Hewlett. |
| 1967-1974 | P. O. Dennis. |
| 1974-1983 | M. D. C. Campbell. |
| 1985-1994 | Dr. MC Black. |
| 1994-1998 | Stephanie Snell (now Ward) |
| 1998-2007 | D. Legg |
| 2007-2012 | R. J. Park |
| 2012-2017 | D. I. A. Robertson |
| 2017-2019 | S. N. D. Ball |
| 2023-present | O. Farrell |
Below is a partial list of all of the Treasurers of the Royal College of Science Association from our first Treasurer, A T Simmons in 1909, to the current Treasurer.
| 1909-1913 | A. T. Simmons. |
| 1913-1914 | R. F. Gwinnell. |
| 1914-1921 | J. Allen Howe, O.B.E. |
| 1921-1932 | Assistant Professor W. E. G. Sillick. |
| 1932-1938 | P. C. Bull, D.S.O. |
| 1938 | Professor R. P. Linstead, C.B.E., F.R.S. |
| 1938-1948 | Dr. R. H. Purcell. |
| 1948-1950 | Assistant Professor H. R. Hewer. |
| 1950-unknown | Assistant Professor H. N. Rydon. |
| 1973-1980 | S. P. Cook |
| 1984-1988 | J. P. Smith. |
| 1988-1989 | D. W. Parry. |
| 1991-1998 | B. F. Middleton. |
| 1999 | M. Griffiths. |
| 2008-2009 | J. Matthews. |
| 2009-2017 | S. K. Davis. |
| 2017-2019 | D. I. A. Robertson. |
| 2023-present | A. Needham. |