High Quality Content by WIKIPEDIA articles! A Chief Operating Officer (or Chief Operations Officer; COO) or Director of Operations (or Operations Director) can be one of the highest-ranking executives in an organization and comprises part of the "C-Suite". The COO is responsible for the daily operation of the company, and routinely reports to the highest ranking executive, usually the Chief Executive Officer (CEO). The COO may also carry the title of President which makes him or her the clear number-two in command at the firm, especially if the highest ranking executive is the Chairman and CEO.