| Schwarz, Otto, | Otto Schwarz | Director | 1927 | 3 | |
| Schwitzky, Ernst Bernhard, | Ernst Bernhard Schwitzky | Director | 1927 | 1 | |
| Schmith, Iwan, | Iwan Schmith | Director | 1932 | 1 | |
| Sax, Sergius, | Sergius Sax | Director | 1933 | 9 | |
| Schmitt, Saladin, | Saladin Schmitt | Director | 1933 | 2 | |
| Schmiedhammer, Dr., | Dr. Schmiedhammer | Director | 1937 | 1 | |
| Scherler, Gerhart, | Gerhart Scherler | Director | 1937 | 1 | |
| Schnyder, Franz, | Franz Schnyder | Director | 1940 | 1 | |
| Schuckel, Gert, | Gert Schuckel | Director | 1945 | 1 | |
| Sanin, A., | A. Sanin | Director | 1901 | 1 | |
| Schmaha, Josef, | Josef Schmaha | Director | 1907 | 4 | |
| Sørlie, Kirsten, | Kirsten Sørlie | Director | 1980 | 4 | |
| Sjenovatsj, Sergej, | Sergej Sjenovatsj | Director | 1996 | 1 | |
| Sandven, Wilhelm, | Wilhelm Sandven | Director | 1997 | 1 | |
| Simensen, Knut, | Knut Simensen | Director | 2006 | 2 | |
| Sæther, Anne Mali, | Anne Mali Sæther | Director | 2006 – 2007 | 2 | |
| Steigum, Jorid Bakken, | Jorid Bakken Steigum | Director | 2009 | 2 | |
| Skjønnberg, Jo, | Jo Skjønnberg | Director | 2009 | 4 | |
| Stranger, Marianne, | Marianne Stranger | Director | 2012 | 1 | |
| Stuedal, Merete M., | Merete M. Stuedal (Merete M. Stuedal) | Director | 2013 | 2 | |
| Sekiguchi, Tsugio, | Tsugio Sekiguchi | Director | 1918 | 1 | |
| Sergiev, E., | E. Sergiev | Director | 1923 | 1 | |
| Stojtschev, P. K., | P. K. Stojtschev (P. K. Stojtschev) | Director | 1923 | 1 | |
| Szinetár, Miklós | Miklós Szinetár | Director | 1974 | 2 | |
| Sturzenegger, Yvonne | Yvonne Sturzenegger | Director | 1974 | 1 | |
| Skála, Jaroslav | Jaroslav Skála | Director | 1928 | 1 | |
| Stelzer, Peter A. | Peter A. Stelzer | Director | 1973 | 1 | |
| Siddons, Bruce | Bruce Siddons | Director | 1979 | 1 | |
| Saraiva, Hamilton | Hamilton Saraiva | Director | 1978 | 1 | |
| Shelton, Brian | Brian Shelton | Director | 1972 | 1 | |
| Szűcs , János | János Szűcs | Director | 1978 | 1 | |
| Sherrin, Robert | Robert Sherrin | Director | 1973 | 1 | |
| Schönerstädt, Emil | Emil Schönerstädt | Director | 1889 | 1 | |
| Schröder, Karl | Karl Schröder | Director | 1889 | 1 | |
| Scherenberg, Gustav | Gustav Otto Scherenberg | Director | 1892 | 1 | |
| Shapiro, Leonardo | Leonardo Shapiro | Director | 1975 | 1 | |
| Shapiro, Bruce G. | Bruce G. Shapiro | Director | 1979 | 1 | |
| Shoctor, Joseph | Joseph Shoctor | Director | 1972 | 1 | |
| Schumacher, Erich | Erich Schumacher | Director | 1972 | 1 | |
| Savadove, Lane | Lane Savadove | Director | 2014 | 1 | |
| Sokolovský, Evžen | Evžen Sokolovský | Director | 1972 – 1994 | 6 | |
| Szikora, János | János Szikora | Director | 1979 | 1 | |
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