I have been working at Urban Institute full-time
Everyone is very supportive and cooperative at Urban
The technology and softwares they use is pretty outdated compared to the industry
I applied online. The process took 2+ months. I interviewed at Urban Institute (Washington, DC).
I applied for a research assistant position at Urban, the process took about two months total. I was first asked to do a phone screening interview, which lasted about an hour and went quite well. Then I had an in-person interview about three weeks later, which was more mixed. I didn't recieve an offer, but overall the experience was fine. They really only seem to care about data-type credentials so my advice is to emphasize your data background to whatever extent is possible!