Complex sentence: He has been in charge of vast operations as Deputy Chancellor of the New York City School System and been involved in the most shoestring entrepreneurial ventures.Posman believes that there is a natural fit between the two.
Split into simpler sentences: He has been in charge of vast operations as Deputy Chancellor of the New York City School System and been involved in the most shoestring entrepreneurial ventures. The two pillars of Mr. Posman's professional life have been education and entrepreneurship and he believes that there is a natural fit between the two.