what is an E-8/E-9 ranking in all branches of service?

Answer 1

Air Force
E-8 is a Senior Master Sergeant, E-9 is a Chief Master Sergeant

Navy
E-8 is a Senior Chief Petty Officer, E-9 is a Master Chief Petty Officer

Army
E-8 is a Master Sergeant, E-9 is a Sergeant Major

Marines
E-8 is a Master Sergeant, E-9 is a Master Gunnery Sergeant

Coast Guard is the same as the Navy

Answer 2

E-8 Army - Master SGT or First Sergeant E-9 - Sergeant Major or Command Sergeant Major.

E-8 Air Force - Senior Master Sergeant, E-9 Chief Master Sergeant

E-8 Navy - Senior Chief Petty Officer E-9 Master Chief
Petty Officer

E-8 USMC - Master SGT or First SGT E-9 Master Gunnery SGT of SGT Major

Answer 3

E-9 is the highest you can go as an enlisted person. In the army this would be Sergent Major, or Command Sgt.Major. An E-8 in the army is a Master Sgt., or First Sgt.