Complex sentence: After leaving NASA, Sullivan served as President and CEO of the COSI Columbus, an interactive science center in Columbus, Ohioand as Director for Ohio State University's Battelle Center for Mathematics and Science Education Policy as well as a volunteer science advisor to COSI.
Split into simpler sentences: After leaving NASA, Sullivan served as President and CEO of the COSI Columbus, an interactive science center in Columbus, Ohio. Sullivan currently serves as Director for Ohio State University's Battelle Center for Mathematics and Science Education Policy and as a volunteer science advisor to COSI.