A detailee is an employee of a

United States executive branch The federal government of the United States (U.S. federal government or U.S. government) is the national government of the United States, a federal republic located primarily in North America, composed of 50 states, a city within a fede ...

government agency temporarily assigned to another position, generally in another U.S. government agency or an international organization. The employee's original agency will usually continue to pay the person's salary.Detailees
at U.S. Office of Government Ethics site

References

See also