Directors of the Federal Mediation and Conciliation Service (with the date they took office listed and the President who made the appointment shown in parentheses), are as follows: The Biden Administration has failed to nominate and confirm an FMCS Director.
- Cyrus S. Ching (1947; Truman)
- David L. Cole (1952; Truman)
- Whitney P. McCoy (1953; Eisenhower)
- Joseph F. Finnegan (1955; Eisenhower)
- William E. Simkin (1961; Kennedy), the longest-serving Director, departing office in 1969
- J. Curtis Counts (1970; Nixon)
- William Usery, Jr. (1973; Nixon)
- James F. Scearce (1976; Ford)
- Wayne L. Horvitz (1977; Carter)
- Kenneth Moffett (1982; Reagan), served for seven months. (Never confirmed by the Senate)
- Kay McMurray (1982; Reagan)
- Bernard E. DeLury (1990; G. H. W. Bush)
- John Calhoun Wells (1993; Clinton)
- C. Richard Barnes (2000; Clinton)
- Peter J. Hurtgen (2002; G. W. Bush)
- Arthur F. Rosenfeld (2006; G. W. Bush)
- George H. Cohen (2009; Obama)
- Allison Beck (2014; Obama), the first woman to serve as director
- Richard Giacolone (2018; Donald J. Trump)
- No Director (2021-2025; Joe Biden)