as Hans de Koning is appointed as the clubs's new head coach in 2005. The former goalkeeper leads TOP Oss to two period titles and the team qualifies for Nacompetitie (promotion play-offs) three times in five years. De Koning forged a successful team based on local talents from Oss, such as Bart van Hintum, Erik Quekel, Tony de Groot and Regilio Jacobs. In the club's 25th anniversary of professional football, fans voted De Koning as TOP Oss' Best Coach since 1991. In the summer of 2009, the club was renamed FC Oss in order to separate the professional branch of the club from its amateur section. Ten months later, the club experienced a historical low point. After an intense relegation battle with Telstar and Fortuna Sittard, FC Oss suffered relegation to the Topklasse by losing the final match 5–1 to MVV Maastricht. Thereby, they became the first club to relegate to the third level of Dutch football in more than forty years, after the KNVB had reformed the league structure to merge professional and amateur football leagues. Third division champions and a record year (2011–present) Following the disastrous relegation, Dirk Heesen is promoted from assistant to head coach and given the task of leading the club back to the Eerste Divisie. A strong 2010–11 season, with only one loss to JVC Cuijk (2–1), meant that the club won the 2010–11 Topklasse Sunday Group. In the decisive match, FC Oss beat Achilles'29 2–0 after goals from Jean Black and Geoffrey Galatà. Oss then lost the championship game for the entire Topklasse title against IJsselmeervogels from the Saturday Group 0–4 on aggregate. However, IJsselmeervogels had already decided to deny promotion due to financial reasons and a desire to continue as an amateur club, which meant that FC Oss had secured promotion prior to the championship game. After the return to the Eerste Divisie, FC Oss alternate good seasons with bad season. Under head coach Dirk Heesen (2011–12) the team plays spectacular football, and score many goals. With Anton Janssen (2012–13) and Klaas Wels (2017–18) as head coaches, Oss compete for a place in the post-season play-offs for large parts of the season, but miss out in the end. With Wil Boessen at the helm, however, the team managed to qualify for promotion play-offs, because on 27 February 2015, they win the third period title. With key players such as Kevin van Veen,