Sibum began playing football at SV Twedo in his hometown
Nieuw-Amsterdam,
Drenthe. He was scouted by the local professional club,
Emmen, where he made his professional debut in the second-tier
Eerste Divisie in the
2000–01 season. On 7 April 2001, he replaced
Alami Ahannach in the 73rd minute of a 2–0 league loss to
Heracles Almelo to make his professional debut. In his third and final year with the second division club, he was a regular starter, making 33 appearances and scoring five goals. Sibum joined
Eredivisie club
Twente in 2003. Sibum quickly secured a spot in the starting lineup under coach
René Vandereycken, playing alongside
Peter Niemeyer,
Giorgi Gakhokidze, and
Simon Cziommer. Over three seasons, he made 87 appearances for the
Tukkers. Consequently, during the winter break, both Niemeyer and Sibum left the club; Niemeyer joined
Werder Bremen, while Sibum transferred to
Roda JC. In his year at Roda JC, Sibum struggled to secure a regular spot in
Raymond Atteveld's team, but he did score his first ever Eredivisie goal on 10 February 2007, in a 1–0 win against
NEC. In January 2008, he signed a three-and-a-half-year contract with NEC. He quickly became a regular starter and a fan favourite. Under manager
Mario Been, he demonstrated his abilities on an international stage in the
UEFA Cup, playing in seven matches. In the
2009–10 season, a hip injury set him back, but he returned to the team during the winter break. Despite his efforts, NEC finished in the lower half of the table again in the
2010–11 season, following 11th and 13th place finishes in the previous seasons. He played in
Nijmegen for three-and-a-half seasons before departing for German club
Alemannia Aachen in the summer of 2011. In his only season at the club, Aachen suffered relegation from the
2. Bundesliga. In 2012, he signed a one-year contract with Belgian club
Waasland-Beveren, with an option for an additional year. On 3 June 2014,
Heracles Almelo announced that Sibum had signed a two-year contract with the club, with an option for an additional season. In his first year, he made eight league appearances, but none in the second year. After the 2015–16 season, Sibum retired from professional football. ==Managerial career==