<p>World Changer, I've lived and worked overseas for some 30 years. Although I've always been involved in the private sector, I've many friends who are "official Americans" e.g. with the State or Commercer Departments or who work for NGO's. </p>
<p>In the Peace Corps they characterize their applicants as world-savers, adventurers or resume builders. If you're interested in the foreign service, NGOs or an overseas assignment with an American firm, it helps to be a little of all three. Over the years, the people who seem to be the most successful in international careers are those who are willing to take risks, have uncomplicated personal lives (e.g., have assignment will travel) and most importantly have intense curiousity about politics and culture. It also helps to have a well developed sense of humor and a mountain of patience. </p>
<p>Careers with "international" in their resumes are extremely varied. You can join the foreign service (which covers several agencies or departments and within each involves different focuses from diplomatic to to economica to administrative), you can work for an NGO (which can range from health care to politics to arts to ecology), you can work for an international firm (again in many, many areas: finance, manufacturing, marketing). </p>
<p>So in answer to your question, is the field oversaturated, I'd say it depends what you want to do and where you want to do it. Some countries and some fields are more popular than other and would be difficult to crack into, but a person with a will to travel and a sincere interest in foreign culture and politics should have a lot opportunities.</p>
<p>Your major can be anything you can possibily imagine. I know engineers, botanists, philosophers -- you name it -- who have done well in international assignments. The common thread is again intellectual curiosity and a high tolerance (or even thirst for) the weird and wonderful.</p>
<p>Language aptitude is extremely helpful, but actual fluency in a specific language is not necessarily a requirement for assignment. It is assumed that you will acquire the language on site and most often you are given language training. </p>
<p>Aptitude in lucid and precise written English doesn't hurt as well as a lot of what we do overseas is communicate with the "home office" and it doesn't matter if the home office is the State Department or Citibank. The point is that as the representative of organization or corporation you're supposed to know what's going on and be able to articulate it to those back home. (And believe me, this is sometimes a lot harder than it sounds!)</p>
<p>If you have any specific questions please let me know.</p>