Keep your answer short, and let your interviewer ask follow-up questions if necessary. Your time is short, and you don't want to waste a lot of time walking through the information that is easily obtained by reading your resume.
It is acceptable to combine several roles into a summary response if you are on the Executive MBA path. You have at least 14 years of experience if you are interviewing for a spot in that program, and walking your interviewer through every role may take more time than necessary.
