What is the full title of the individual currently serving as Secretary of Defense?

The full title of the individual currently serving as Secretary of Defense is "Secretary of Defense Mark T. Esper." This title accurately reflects his position, combining both his role and his name in a formal manner. The designation "Secretary of Defense" is the official title used in government and military contexts, denoting his leadership role in overseeing the Department of Defense.

Using the full title is important for clarity and respect within official communication and documentation. The alternative options may contain variations in phrasing, but they do not represent the complete and official title used in the context of his position. For instance, abbreviating the title or omitting "of Defense" does not provide the full description of his role. It’s crucial to use proper titles as they represent both the authority of the individual and the institutional framework of the Department of Defense.