Complex sentence: Instead of returning to Auburn as previously planned, York accepted an offer to be the provost for agriculture at the University of Florida, and, later, as its vice president for agricultural, natural and human resources, and its executive vice president.
Split into simpler sentences: Instead of returning to Auburn as previously planned, York accepted an offer to be the provost for agriculture at the University of Florida. Later, he would also serve as the university's vice president for agricultural, natural and human resources, and its executive vice president.