I'll echo and sum up some ...

I'll echo and sum up some convos below: Parnership! Please don't just go and try to find communities in need. Find the people who are ALREADY doing the kind of work you want to support- organizations with a local presence (registered with the country you're working on, with national staff not only immigrants. The immigrants I refer to are typically called "expats" in this context, but there's no good reason to use different words based on the privilege of their origin country). Your website has excellent verbiage around your approach- so also look for orgs that highlight those things. The only thing I would add is look for orgs that also mention "service provision", impact evaluation, and partnership. 

If you want to talk more, I direct a program within an NGO that works in Latin America and Africa, and we work with international partners- donors and service learning volunteers (typically professional engineers and engineering students- even the most expert of us have a lot to learn from locals when working in new contexts.)