No. But I have done some digging.
His assistant at Alavés was another Argentine called Carlos Compagnucci, who has worked with Pellegrino at his previous three clubs, so I'd imagine he'd be one of them.
And there was another called Xavier Tamarit, who also worked with him at Estudiantes, Independiente and Alavés.
He also worked with a Fitness Coach called Gabriel Macaya Fernández he's been with Pellegrino at every club he has managed.