Guylain Ndumbu-Nsungu (born December 26, 1982) is a Congolese professional footballer, formerly an under-21 international, currently playing as a striker for Gillingham.
The former Amiens SC, Sheffield Wednesday, Preston North End, Colchester United and Darlington hitman was signed on a free transfer from Cardiff City on 12th May 2006. He joined Sheffield Wednesday in 2003 initally on loan before signing permanently 4 months later. In 35 league appearances (11 as a substitute) he scored 10 goals. After spells at Preston (on loan) and Colchester, he joined Darlington at the start of the 2005/06 season, where he scored 10 goals in 21 league appearances. Cardiff took a chance on him in January, where he made 11 appearances including 7 as a sub. He was relased at the end of the 2005/2006 season and signed by Gillingham.