Guylain Ndumbu-Nsungu (born 26 December 1982) is a Congolese professional footballer, formerly an under-21 international. He has played for Amiens SC, Sheffield Wednesday, Preston North End, Colchester United, Cardiff City, Gillingham, Bradford City and had two spells at Darlington. Career Ndumbu-Nsungu started his career in France with Ligue 2 side Amiens SC. He made his professional debut on 15 September 2001, coming on as a late substitute for Fahid Ben Khalfallah in the 1–1 draw away at Le Mans. He went on to make a further six appearances during the 2001–02 season, all of them as a substitute, but spent the majority of the campaign in the reserve team. On 17 August 2012, Ndumbu-Nsungu was given his first start for Amiens and scored the winning goal in the 1–0 win against Saint-Étienne, before being replaced by Léandre Griffit later in the game. He was selected to start in the following two matches, but did not score and subsequently returned to the reserves for several months before returning to the senior side towards the end of the 2002–03 campaign. He made his thirteenth and final appearance for Amiens on 12 April 2003, playing the first 50 minutes of the 0–0 draw against Gueugnon before being substituted. In August 2003 he joined Sheffield Wednesday, initially on loan before signing permanently four months later for a fee of £50,000. In 35 league appearances, 11 as a substitute, he scored 10 goals, making him the club's top goalscorer in the 2003–04 season. This form attracted the attention of West Ham United manager Alan Pardew and it was reported in The Sun that he was ready to make a £1 million bid, but it never materialised. He won the club's player of the season award, but failed to find favour with the new manager Paul Sturrock and spent time on a short loan with Championship side Preston North End before being released. After a spell at Colchester United where he scored once against AFC Bournemouth, he joined Darlington at the start of the 2005–06 season, where he scored 10 goals in 21 league appearances. He moved to Cardiff City in January 2006, where he made 11 appearances including seven as substitute. He was released at the end of the season and signed by Gillingham. He scored his first goal for Gillingham away to Blackpool on 26 August 2006 in a game which ended 1–1. He