From the page titled "Our Scientists, Doctors, and Researchers"
programmer
gamer
mba
programmer
student/mathematics
student/medicine
md/recent grad
student/medicine
econ BA/finance (labeled researcher)
marine biologist (labeled researcher)
industrial engineer/entrepreneur (labeled senior researcher)
econ BA/event planner
student/philosophy+neuroscience+law (labeled researcher)
md/recent grad (labeled researcher)
eagle scout/philosopher (labeled researcher)
graphic designer
md/practicioner
novelist
phd molecular biologist/recent grad (labeled researcher)
programmer (labeled researcher)
college research assistant (labeled researcher)
blogger
programmer