I worked with some Iraqi expats setting up an internet exchange in 2003/2004; it got too dangerous and too chaotic, so pivoted to satellite ISP. I ended up moving into a base, and then set up my own satellite ISP, and did backhaul for cellular, did various radio stuff, etc. Left in 2007. 2008-2010 I worked for a company doing medical imaging (radiology PACS) in hospitals across CENTCOM; worked with the satellite stuff but mainly linux servers in hospitals, which was my first exposure to the medical industry.