Columbia subject headings:
Engineering and state--United States.
Engineers--Employment--United States.
Science and state--United States.
Scientists--Employment--United States.
United States--Officials and employees.
Harvard subject headings:
Civil service positions--United States
Engineers--United States
Scientists--United States
United States--Officials and employees--Recruiting.
Princeton subject headings:
Engineers--Employment--United States.
Scientists--Employment--United States.
United States--Officials and employees.