Complex sentence: Hoyer worked in the admissions office and then the alumni/development office, and was also a baseball coach at the University after graduating, then moved onto Kenyon College before joining the Red Sox at 28.
Split into simpler sentences: Hoyer worked in the admissions office and then the alumni/development office, and was also a baseball coach at the university after graduating. He attended Kenyon College before joining the Red Sox at 28.