Martha was nominated as a “Suspected Sentientist” via our “I know a Sentientist” form (thank you!). More details are forthcoming, but in the meantime, here is Martha on Wikipedia.
Martha has written extensively on non-human animal ethics. While she has focused on developing a capabilities approach she does seem to grant moral consideration to all sentient beings regardless of capabilities. While she seems to have a broadly naturalistic worldview she converted to Judaism in 2008.