Final answer:
The insignia of a Command Sergeant Major in the U.S. Army consists of three chevrons above three arcs with a star at the center, symbolizing high authority and responsibility akin to higher civil service grades.
Step-by-step explanation:
The insignia for a Command Sergeant Major, which is a senior non-commissioned officer's rank in the United States Army, represents a high level of leadership and experience. In terms of the rank structure, it is similar in significance to a high-ranking official within a civil service, as indicated by the presence of two cranes in the reference information.
However, the specific insignia for a Command Sergeant Major includes three chevrons above three arcs or rockers, with a star at the center of the insignia. The star represents the Command Sergeant Major's authority, distinguishing it from the Sergeant Major, which does not include a star.
The insignia indicates a rank of significant responsibility, akin to the higher grades in the General Schedule of civil service, which requires specialized experience and often a higher level of education, as referenced with the GS-13 and above. It's important to note that this insignia is specific to the U.S. Army, as military insignia can vary by country and branch of service.