Van Persie, 37, had a final season as a player with the Dutch side in 2018-19 and will now work under manager Dick Advocaat to help the forwards.
"It is not an official position so it's hard for me to give it a title," said the former Netherlands international.
"It's a win-win. I'll find out here whether I like doing this and help the staff a bit."
Since his retirement as a player last year, he has been working in the media in England.