Sparta Kew Jaliens started his career at
Sparta and made his league debut aged 18 in a 2–1 away win over
FC Groningen on 25 May 1997. In the following 1997–98 season, Jaliens became a regular in the starting lineup. He finished his career at Sparta with 68 league appearances scoring 4 goals.
Willem II Jaliens signed for
Willem II in 1999 and made his league debut on 28 August in a match against
FC Den Bosch. He scored his first goal on 3 February 2001 in a match against
FC Twente Enschede.
AZ In 2004 Jaliens signed for
AZ and made his league debut in a 1–1 draw with
SC Heerenveen on 14 August. He scored his first goal for AZ on 16 March 2005 in a match against
Vitesse Arnhem. In July 2007 he signed a contract extension to 2012, with AZ director of football Marcel Brands, who described him as a "cornerstone of the team". Jaliens took a part in winning the
Eredivisie and
Dutch Super Cup in 2009.
Wisła Kraków On 26 January 2011, Jaliens joined Polish
Ekstraklasa side
Wisła Kraków on a free transfer from AZ. He signed a two-and-a-half-year deal. Jaliens won the Ekstraklasa championship in his
debut season.
Newcastle Jets On 15 August 2013, it was announced that Jaliens had signed with Australian club
Newcastle Jets. On 4 August 2014, Jaliens was named as captain of the Newcastle Jets for the upcoming 2014–15 season. Jaliens was reportedly sacked from the Jets by owner
Nathan Tinkler following a player revolt midway through the
2014–15 A-League season.
Melbourne City Barely two weeks after his departure from Newcastle, Jaliens joined A-League rival
Melbourne City on an injury replacement short-term contract. Subsequently, Jaliens netted one of the winning goals in his first appearance against his former club, Newcastle Jets. ==International career==