デ・フラーフスハップ
Following Fortuna Sittard's relegation, Hermans remained in the Eredivisie, having been signed by De Graafschap. The 2002–03 season was not a success, however, as De Graafschap were relegated. In the 2003–04 Eerste Divisie season, despite finishing in sixth place in the regular competition, Hermans helped De Graafschap win one of the two playoffs groups and achieve promotion back to the Eredivisie.