COMMAND SERGEANT MAJOR (CSM) CSMs are the senior enlisted advisors to the commanding officer. They carry out policies and standards, and advise the commander on the performance, training, appearance, and conduct of enlisted soldiers. The CSM's counsel is expected to be calm, settled and unequivocally accurate, but with an energy and enthusiasm that never wanes, even in the worst of times. A CSM is assignable to any level Battalion or higher.
Like I told him: CSM is a mentor/leader, and one of the most (if not the most) highly respected ranks in the Army.