Master Chief Petty Officer of the Coast Guard Reserve Force
The master chief petty officer of the Coast Guard Reserve (MCPO CGR) is a liaison between the Assistant Commandant for the Reserve (CG-R), the Master Chief Petty Officer of the Coast Guard (MCPOCG), and the Coast Guard Commandant’s office. From 1991-2018, the position was called master chief petty officer of the Coast Guard Reserve Fleet (MCPO CGRF).
Source: Wikipedia — Master Chief Petty Officer of the Coast Guard Reserve Force (CC BY-SA 4.0)