I have a question about how the reserve side handles it more than the civil service side necessarily. Say you end up working for DoS and are assigned to an embassy or maybe you are a teacher for DoDEA assigned overseas and you are also in the reserves. What are your options as far as continuing to drill and make good years other than taking an international flight back to the unit you were with back in the States regularly? Not sure if that is a common problem that has a cookie-cutter solution or not, but some of those jobs interest me and I'm wondering what the long term plan for keeping up with the reserves includes.
Many units have 'flex drill' as an option where you drill some weekends but do real work in lieu of going to every drill weekend (the units usually have a description if they drill most weekends or are flex drill in JOAPPLY). Several types of units, particularly ones that support exercises or watches, tend to do this versus some of the more traditional units. My first unit supported a watch and we had only two 'mandatory' drill weekends a year, they wanted you to stand the watch with the rest of your drills and AT. We had a lot of guys I saw only on the watch, they never came to drill, who lived across the country or even in Europe. They came to the states 2 or 3 times a years and did their time. My current unit has a guy who only comes to the exercise supprt, he hasn't come to a single drill my 2 years in the unit since he lives in Hong Kong where he flies for an airline.
There are also a few units overseas too, each COCOM and their Navy component usually have a few reserve units associated with them. The NATO unit I was In was based in DC but we had a member who lived in Germany and had done a career with overseas units in Europe before then.
So defiantly doable, you just have to find the right units and the right employer. As is often the case networking is key, most of the guys in my current unit found out about it through networking. But don't be afraid to do some cold calls either though, I got in my first unit by simply knocking on a door and asking if they used reservists.