in the union government, the members head department wings in the departments and ministries of the union government, and hold positions such as chief vigilance officer (cvo), chief administrative officer (cao), emissaries in the foreign missions/embassies (ambassadors and ministers), registrar general and census commissioner of india, director general of civil aviation of india, director general of national literacy mission authority, economic advisers, advisors of trai, joint directors of cbi, additional directors general (air and doordarshan), board members of staff selection commission of india commissioners of taxes and police, chief engineers in central departments.