“Daniel’s return is about results on the pitch and identity,” said chairman Neerav Parekh. “During his first spell, the club stood for high-intensity football, belief in young players and a team that supporters could fully connect with.
“That season produced outstanding performances, an unbeaten home league campaign and a group of young players who grew together and went on to reach the highest levels of the game.
“We want to re-establish that same connection between the fans, the town and the football club – a Barnsley side that plays with energy, bravery and pride.”
Stendel’s contract at Oakwell contains an option for a third year.
“This is a place that means a great deal to me and I’m really looking forward to reconnecting with old friends, while also getting to know new faces around the club and in the town,” he said.
“I can’t wait to get back to work and start this next chapter together.”
Barnsley were relegated from the Championship in 2022 and reached the play-offs in each of the following two seasons, losing in the 2023 final at Wembley to Sheffield Wednesday.