Most certainly. To give just four of many living examples: William L. Rowe, J. L. Schellenberg, Graham Oppy, and Erik Wielenberg. To see which issues they find interesting, start by following those links. One needn't believe that God exists in order to find questions in philosophy of religion worth pursuing, especially since so many people at home and abroad do believe that God exists (or tell pollsters that they do) and allow that belief to guide their behavior. Atheists regard theistic belief as false, but they needn't thereby regard it as unimportant.
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Can someone be an atheist and do good work in the philosophy of religion? what sorts of issues would attract such a person?