Jungsa or chungsa is a Korean military rank used by the armed forces of South and North Korea. A jungsa is the equivalent to a staff sergeant. The rank of jungsa is junior to a sangsa in North and South Korea. ... Found on http://en.wikipedia.org/wiki/Jungsa
1) Military rank of North Korea 
Jungsa or chungsa is a Korean military rank used by the armed forces of South and North Korea. A jungsa is the equivalent to a staff sergeant. The rank of jungsa is junior to a sangsa in North and South Korea. ...