The official emblem of the organization is made up of a shield crossed by a scroll bearing the letters "NTHS". Above the shield is the head of an American Bald Eagle with a wreath of seven stars circling the eagle’s head. 

The shield represents the individual member. The line running through the shield represents a straight "plumb line", fundamental to building a life and career upon a good foundation. The Bald Eagle's head represents the United States of America and the individual’s freedom of career choice. The wreath of seven stars represents the seven attributes of the NTHS member and the individual NTHS Chapters throughout the US.

The official insignia of the organization which is used on all charters, membership certificates, documents and stationery is made up of the official NTHS emblem as its central figure and also an arch upon which are inscribed the seven attributes of the membership (skill, scholarship, honesty, responsibility, service, leadership, and citizenship), the year the Society was established (1984), and the motto of the organization. The arch itself represents the student's passage from school or college into the workforce; the steps represent the preparation necessary to make that transition.