I wouldn't say outright "no", it just depends what you mean, what you would want to do and how immediately you want to get there. Outside the realm of licensable fields the lines between professions grow somewhat blurry. There is nothing to inherently prevent you from doing IO work, though you would likely have a hard time convincing someone you are competent to do it. A slow transition over time could create opportunities for you to function in more of an IO type role. Incredible persistence and a willingness to move literally anywhere for that first job might allow a more rapid transition. Its basically the same thing as asking whether a psychologist could work as an epidemiologist or a statistician or a health economist, etc. Is it possible? Absolutely. Are you likely to be hired into a job looking for someone to do traditional IO type activities straight out of grad school? That is very unlikely and you probably wouldn't know what to do if they did hire you!
IO is quite diverse, so what did you have in mind?
