Complex sentence: He left as a senior vice president and partner in 1990 to become senior partner of Woolf Associates Sports Management in Boston, and he then became managing director of Seaward Management, an investment advisory firm, in 1992.
Split into simpler sentences: He left as a senior vice president and partner in 1990 to become senior partner of Woolf Associates Sports Management in Boston. He subsequently became managing director of Seaward Management, a Boston-based investment advisory firm, in 1992.