The first Archivist, R.D.W. Connor, began serving in 1934, when the National Archives was established by Congress. As a result of a first Hoover Commission recommendation, in 1949 the National Archives was placed within the newly formed General Services Administration (GSA). The Archivist served as a subordinate official to the GSA Administrator until the National Archives and Records Administration became an independent agency on April 1, 1985.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What commission merged the National Archives with GSA?
Hoover Commission