Anonymouswhat does bill do is it right sentenceYes. It needs some punctuation: What does Bill do? (Caps too!)
It works for both historical present and habitual behavior.
Last night, Bill and Jack get in this fight. Jack pours a drink over Bill's head. (reply) What does Bill do?
I saw our old frends Bill and Jack yesterday. Jack is working for a trucking company. (reply) What does Bill do?