Early career He began his career with
Afrisports of Kitwe. He was discovered at a U-16 tournament in Chambeshi, Zambia and he was referred to Afrisports. He then joined
Konkola Blades under a
loan arrangement. After representing Zambia at the
2007 FIFA U-20 World Cup, the 19-year-old was invited for trials at the English side
Reading. The
Championship side was keen on securing him on a longer deal but due to work permit problems the move did not materialise.
TP Mazembe In 2010, Sunzu transferred to TP Mazembe of Democratic Republic of Congo. His registration to Zanaco was a loan from Afrisports and there was some initial dispute regarding his move to TP Mazembe but it was eventually resolved. With Mazembe, he won domestic titles as well as the
2010 CAF Champions League. In November 2012, he was shortlisted for the
2012 Africa-based Player of the Year award. In January 2013, he trained with
Reading in the English
Premier League with a view to being offered a contract. He returned to the
2013 African Cup of Nations without any contract being signed. Sunzu came to Reading on the premise of being a free agent, with his three-year contract expiring in December 2012. Moses Katumbi, president of TP Mazembe, accused Sunzu's handlers of lying to Reading about his contract stating that it does not expire until 2015.
Stints in France and China On 6 January 2014, Sunzu joined French
Ligue 1 club
Sochaux-Montbéliard along with his teammate
Nathan Sinkala. He scored important goals but could not prevent the relegation of the French side to Ligue 2. On 29 December 2014, Sunzu transferred to
Chinese Super League side
Shanghai Greenland Shenhua. He made his debut and scored his first goal for Shanghai Greenland Shenhua on 8 March 2015, in a 6–2 victory against city rivals
Shanghai Shenxin. Sunzu was loaned to
Lille for one year on 28 July 2015. In his first season there, he made 16 appearances scoring twice. On 10 July 2016, he joined Lille permanently on a three-year contract, for an undisclosed fee. In July 2017, he re-joined Arsenal Tula on loan for the 2017–18 season.
Metz before a match against
RC Lens On 9 July 2018, he returned to France, signing a two-year contract with
FC Metz. He made his league debut for the club on 30 July 2018, playing all ninety minutes in a 1–0 away victory over
Stade Brest. He scored his first competitive goal for the club on 19 October 2018 in a 3–0 league victory over
Chamois Niortais. His goal, assisted by
Marvin Gakpa, was scored in the 80th minute.
Shijiazhuang Ever Bright In the 2019–20 winter transfer period, Sunzu left Metz to join
Chinese Super League side
Shijiazhuang Ever Bright.
Jinan Xingzhou On 21 April 2023, Sunzu joined
China League One side
Jinan Xingzhou.
Return to Cangzhou Mighty Lions On 29 February 2024, Sunzu rejoined
Chinese Super League club
Cangzhou Mighty Lions (previous name of Shijiazhuang Ever Bright).
Changchun Yatai On 28 June 2024, Sunzu joined
Chinese Super League club
Changchun Yatai. Two days later, he made his debut for the club in a 5-0 home win against
Qingdao Hainiu. ==International career==