Sergeant First Class (SFC) is a rank in the United States Army, positioned above Staff Sergeant and below Master Sergeant. It is typically held by experienced non-commissioned officers (NCOs) who have demonstrated leadership skills and technical proficiency. SFCs often serve as key advisors to officers and are responsible for training and mentoring junior soldiers. In the Army's rank structure, SFC is classified as an E-7, indicating it is a senior enlisted rank. Individuals in this position play a crucial role in maintaining unit readiness and effectiveness, ensuring that soldiers are well-prepared for their duties and missions.