<P> When the Secret Service was established, its head was called the Chief of the Secret Service . In 1965, the title was changed to the Director of the Secret Service, four years into the term of James Joseph Rowley (1961--1973). The longest serving head of the Secret Service was William H. Moran, who served under five presidents from 1917 to 1936 . </P> <P> On March 27, 2013, President Barack Obama appointed Julia Pierson to be the twenty - third Director of the Secret Service . She became the first female director of the agency . As of October 1, 2014, the Secret Service is led by Director Joseph Clancy, a retired agent who formerly led the Presidential Protective Division . On March 4, 2017, Director Joseph Clancy retired, leaving the position vacant until a replacement is nominated by President Donald Trump . Meanwhile, William J. Callahan served as Acting Director of the United States Secret Service from March 4, 2017 to April 25, 2017 . Randolph D. Alles, former acting deputy commissioner of the U.S. Customs and Border Protection, was appointed director by President of the United States, Donald Trump . </P> <Table> <Tr> <Th> Order </Th> <Th> Name </Th> <Th> Assumed office </Th> <Th> Left office </Th> <Th> President appointed by </Th> </Tr> <Tr> <Td> </Td> <Td> William P. Wood </Td> <Td> July 5, 1865 </Td> <Td> 1869 </Td> <Td> Andrew Johnson </Td> </Tr> <Tr> <Td> </Td> <Td> Hiram C. Whitley </Td> <Td> 1869 </Td> <Td> 1874 </Td> <Td> Ulysses S. Grant </Td> </Tr> <Tr> <Td> </Td> <Td> Elmer Washburn </Td> <Td> 1874 </Td> <Td> 1876 </Td> </Tr> <Tr> <Td> </Td> <Td> James Brooks </Td> <Td> 1876 </Td> <Td> 1888 </Td> <Td> Rutherford B. Hayes </Td> </Tr> <Tr> <Td> 5 </Td> <Td> John S. Bell </Td> <Td> 1888 </Td> <Td> 1890 </Td> <Td> Grover Cleveland </Td> </Tr> <Tr> <Td> 6 </Td> <Td> Andrew L. Drummond </Td> <Td> 1891 </Td> <Td> 1894 </Td> <Td> Benjamin Harrison </Td> </Tr> <Tr> <Td> 7 </Td> <Td> William P. Hazen </Td> <Td> 1894 </Td> <Td> 1898 </Td> <Td> Grover Cleveland </Td> </Tr> <Tr> <Td> 8 </Td> <Td> John E. Wilkie </Td> <Td> 1898 </Td> <Td> 1911 </Td> <Td> William McKinley </Td> </Tr> <Tr> <Td> 9 </Td> <Td> William J. Flynn </Td> <Td> 1912 </Td> <Td> 1917 </Td> <Td> William Howard Taft </Td> </Tr> <Tr> <Td> 10 </Td> <Td> William H. Moran </Td> <Td> 1917 </Td> <Td> 1936 </Td> <Td> Woodrow Wilson </Td> </Tr> <Tr> <Td> 11 </Td> <Td> Frank J. Wilson </Td> <Td> 1937 </Td> <Td> 1946 </Td> <Td> Franklin D. Roosevelt </Td> </Tr> <Tr> <Td> 12 </Td> <Td> James J. Maloney </Td> <Td> 1946 </Td> <Td> 1948 </Td> <Td> Harry Truman </Td> </Tr> <Tr> <Td> 13 </Td> <Td> U.E. Baughman </Td> <Td> 1948 </Td> <Td> 1961 </Td> </Tr> <Tr> <Td> 14 </Td> <Td> James Joseph Rowley </Td> <Td> September 1961 </Td> <Td> October 1973 </Td> <Td> John F. Kennedy </Td> </Tr> <Tr> <Td> 15 </Td> <Td> H. Stuart Knight </Td> <Td> 1973 </Td> <Td> 1981 </Td> <Td> Richard Nixon </Td> </Tr> <Tr> <Td> 16 </Td> <Td> John R. Simpson </Td> <Td> 1981 </Td> <Td> 1992 </Td> <Td> Ronald Reagan </Td> </Tr> <Tr> <Td> 17 </Td> <Td> John Magaw </Td> <Td> 1992 </Td> <Td> 1993 </Td> <Td> George H.W. Bush </Td> </Tr> <Tr> <Td> 18 </Td> <Td> Eljay B. Bowron </Td> <Td> 1993 </Td> <Td> </Td> <Td> Bill Clinton </Td> </Tr> <Tr> <Td> 19 </Td> <Td> Lewis C. Merletti </Td> <Td> June 6, 1997 </Td> <Td> 1999 </Td> </Tr> <Tr> <Td> 20 </Td> <Td> Brian L. Stafford </Td> <Td> March 4, 1999 </Td> <Td> January 24, 2003 </Td> </Tr> <Tr> <Td> 21 </Td> <Td> W. Ralph Basham </Td> <Td> January 27, 2003 </Td> <Td> May 30, 2006 </Td> <Td> George W. Bush </Td> </Tr> <Tr> <Td> 22 </Td> <Td> Mark J. Sullivan </Td> <Td> May 31, 2006 </Td> <Td> March 27, 2013 </Td> </Tr> <Tr> <Td> 23 </Td> <Td> Julia Pierson </Td> <Td> March 27, 2013 </Td> <Td> October 1, 2014 </Td> <Td> Barack Obama </Td> </Tr> <Tr> <Td> 24 </Td> <Td> Joseph Clancy </Td> <Td> October 1, 2014 </Td> <Td> March 4, 2017 </Td> </Tr> <Tr> <Td> Acting </Td> <Td> William J. Callahan </Td> <Td> March 4, 2017 </Td> <Td> April 25, 2017 </Td> <Td> Donald Trump </Td> </Tr> <Tr> <Td> 25 </Td> <Td> Randolph Alles </Td> <Td> April 25, 2017 </Td> <Td> Incumbent </Td> </Tr> </Table> <Tr> <Th> Order </Th> <Th> Name </Th> <Th> Assumed office </Th> <Th> Left office </Th> <Th> President appointed by </Th> </Tr>

Who is the head of the secret service