If you want to know how to qualify for the MAVNI program, look here:
http://www.defense.gov/news/MAVNI-Fact-Sheet.pdf
You must speak one of the listed languages, or qualify as a US licensed medical professional (like a doctor or dentist). You don't need any prior experience if you are signing up as a paramedic, but you do need foreign language expertise. You must also complete a Single Scope Background Investigation (SSBI) successfully; this is a rigorous background check that involves an investigator interviewing you, your employers, your professors, and your friends and family. As of last week, about forty six DACAs had enlisted through the MAVNI program but we are still waiting to see if any of them can pass the SSBI.