Ater James "AJ" Majok (born 4 July 1987) is a professional basketball player for the Nairobi City Thunder of the KBF Premier League.

Upon arrival in Sydney, he bonded with a group of young men also from Sudan, called the South Stars basketball team.

In January 2009, Majok joined the UConn roster and was eligible to practice with the squad for the remainder of the season, but was not able to play in games.

[6] In October 2010, Majok signed a two-month deal with FMV Isikspor Istanbul, a 2nd-division Turkish club.

[citation needed] On 24 December 2010, Majok signed a six-week deal with the Perth Wildcats of the Australian NBL as an injury replacement for Jesse Wagstaff and Matthew Knight.

[10] On 12 February 2011, Majok signed with the Gold Coast Blaze for the rest of the 2010–11 season as an injury replacement for Mark Worthington.

[11] On 22 March 2011, just days before the Gold Coast's final home game of the 2010–11 NBL season against the Adelaide 36ers, Majok was released by the club so that he could advance his preparations and seek out training-camp opportunities in the United States prior to the 2011 NBA draft.

[16] In September 2012, he signed a short-term deal with Maccabi Tel Aviv of Israel but left a month later before appearing in a game for them.

[citation needed] In May 2016, Majok joined Beijing Eastern Bucks of the Chinese National Basketball League.

[citation needed] In June 2017, he signed with the Luoyang Zhonghe of the Chinese National Basketball League.

In his first game with Luoyang, Majok recorded 24 points, 20 rebounds and 7 blocks in a 123–138 loss to Anhui Wenyi.

In June 2018, Majok signed with Shaanxi Xinda of the Chinese National Basketball League.

[37] In March 2023, Majok signed with Angolan club Petro de Luanda, the opponents of Monastir in the previous season's BAL final.

In August 2023, Majok joined Rwandan club Patriots BBC for the remainder of the Rwanda Basketball League (RBL).

[41] In October 2024, Majok signed with the Kenyan national champions Nairobi City Thunder for the 2024–25 season.

[43] On 1 September 2017, Majok's draft rights were traded to the New Orleans Pelicans in exchange for the Chicago Bulls receiving Quincy Pondexter, a 2018 second round pick, and cash considerations.