The 40 officials were supposed to be performing background checks on the census personnel who walk door-to-door throughout the country to collect information about Americans. Instead, they "engaged in pervasive misconduct over several years," according to an investigation by the Commerce Department's inspector general.

The watchdog found at least one employee in the Census Bureau's employment office who "used his official position as a personal hiring vehicle for friends and their families."

That employee, who was not identified, "was involved in a sexual relationship" with a contractor he personally interviewed, hired and supervised.