Junker Expensive of America, or JEA, is a company that produced medical supplies. It was the one that developed the Arsenal Compress during 2014.
Behind the scenes
Junker Expensive of America was a company that was mentioned in Metal Gear Solid 4 in the Compress's model viewer description (although only by its initials). Its name was a reference to the antagonistic megacorp from IdeaSpy 2.5, the radio drama that plays after each mission in the Japanese and European versions of the non-canon game Metal Gear: Ghost Babel, and was itself a reference to the protagonistic military group in the prior Hideo Kojima work Snatcher.