Ask HN: Ethical data mining/machine learning jobs?

I am working on a master's degree in computer science; my research/studies are all related to machine learning and text mining. When I graduate, I would like to find a job where I can actually use these skills. However, I am strongly opposed to the ways ML is used in NSA and government surveillance, and I do not want to work for a company supports or enables these activities. Are there jobs or fields out there where machine learning is used for good? If so, what and where are they?