From that page:
Who we're looking forWe're looking for PhD, masters, and advanced undergraduate students in the computer science, statistics, and the computational and quantitative sciences. If you're an amazing software engineer with a serious interest in data science, we want to hear from you too.
You’ll need statistics, programming, and data skills - but you don’t need to be an expert in every area.
Most of all, we want people who are passionate about using data for social impact.
I'm considering volunteering as a (programming) mentor - Early June to late August.