US Air Force Master Chief Sergeant

This is a USAF Master Chief Sergeant from the space and missile command as indicated by the breast qualification insignia above the medal ribbons of  Meritorious Service Medal, Air Force Organizational Excellence Award, Combat Readiness Medal with Oak-leafs, Vietnam Service Medal, Air Force Overseas Ribbon - Short Tour, Small Arms Expert Marksmanship Ribbon, Republic of Vietnam Campaign Medal rank indicated by chevrons I believe these rank chevrons where worn prior to 1982

US Air Force Staff Sergeant

This is a USAF Staff Sergeant from the air force security police as indicated by the breast qualification badge rank indicated by the chevrons worn on both arms

(note pocket shield would by worn)