Department of Defense Key Officials 1947-1992 Page: 3 of 306

                                
INTRODUCTORY NOTE
This compilation, prepared by the Historical Office, Office of the Secretary of
Defense, presents information about the organization of the Department of
Defense and its key officials since 1947. Offices are listed in accordance with their
status within the Department, for the most part; at the assistant secretary level
functional areas are arranged alphabetically.
In most entries the effective date of incumbency is the initial swearing-in date.
Officials assumed office after an initial swearing-in, followed by a ceremonial
swearing-in days or weeks later. Dates of Department of Defense directives
confirming establishment of positions and prescribing functions usually followed
appointments by months and sometimes years. Offices were often without a
permanent appointee for periods ranging from days to years. During many of these
periods there were acting officials in charge. In other instances there is no indication
of an acting official and a time gap is evident. For the most part, acting officials have
been de facto rather than formally designated.
Rank of statutory officials is established at Executive Level positions, as follows:
Level I - Secretary of Defense; Level II - Deputy Secretary of Defense and Under
Secretary of Defense (Acquisition); Level III - Under Secretary of Defense (Policy) and
Principal Deputy Under Secretary of Defense (Acquisition); and Level IV - Assistant
Secretaries and equivalents.
Editions of this publication have appeared periodically for more than 20 years
under the titles Fact Sheet, Facts, and Fact Book. The title of this edition more
precisely reflects t contents tan did previous titles.

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