From 2004 Agterberg managed the first squad of then Derde Klasse-side SC Woerden, winning a championship in 2006.
[1] In December 2018 Agterberg notified ASWH he had to leave the club after the season, as his family had moved to a new location.
[6][7] Agterberg left SDC Putten in the summer of 2021 to become chief coach of Sport Vereniging Langbroek,[8][9] where he had signed for two years.
[14] According to the club's website, it has been stated that he is no longer able to balance his intensive role as a head coach with his new employment.
[15] While Agterberg initially stated that he would take a sabbatical, in the end he signed with Vierde Divisie-side VV Nieuwenhoorn.