Ottomar Fuerbringer (1840-1850); Paul Israel Baumgart (1851-1869); Johannis Gottlob Walther (1869-1871); Wilhelm Achenback (1871-1883); E. Mangelsdorg (1884-1897); F. Doederlein (1897-1901);
Willian C. Steinman (1901-1922); Theodore Dautenhahn (1923-1930); E. J. Saleska (1930-1943); Armand Graf (1943-1945); Karl Scroeder (1945-1948); Albert Schroeder (1947-1948);
Leonard Dippold (1950-1959); William Bahr (1959-1961); Joesph Schlichtig (1961-1964); William Stellwagen (1964-1967); Elldon Winkler (1969-1973); Dale Meyer (1974-1981);
Richard Smith (1981-1984); David G. L. Fletcher (1985-2009); Arthur Eichhorn (2009-2024); James d’Entremont (2024-present)