Complex sentence: After retiring as a player was assistant manager to Jorge Burruchaga at Arsenal de Sarandí, he has also held coaching positions at Estudiantes de La Plata and Independiente.
Split into simpler sentences: After retiring as a player, Garnero became the assistant manager to Jorge Burruchaga at Arsenal de Sarandí. He has also held coaching positions at Estudiantes de La Plata and Independiente.