Complex sentence: Arthur Falcone began his professional career by investing in fast food restaurants, hotels and health clubs in New York joining his brother, Edward Falcone, turning around troubled, non-performing McDonald's restaurants in the New York area.
Split into simpler sentences: Arthur Falcone began his professional career by investing in fast food restaurants, hotels and health clubs in New York. Falcone joined his brother, Edward Falcone, investing in McDonald's restaurants in the New York area.