An Air Force Pararescueman is slated to become the military’s most senior enlisted man.

The Pentagon announced that Chief Master Sergeant Ramon “CZ” Colon-Lopez will be the new Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff (SEAC). The Air Commando will be the fourth holder of the position. Army General Mark Milley is the current Chairman of the JCS.

CMSgt. Colon-Lopez is currently serving as the Command Senior Enlisted Leader for Headquarters U.S. Africa Command (AFRICOM).

“A big congratulations to my good friend and brother CMSgt CZ Colon-Lopez on his selection as SEAC 4!” said the incumbent SEAC Army Command Sergeant Major John Troxell in a Facebook post. “Sandra Troxell and I are so excited for you and Janet! You are the right leader to take this position to even greater heights!” SMG Troxell is set to retire in December.