She previously played for Klepp IL in the Norwegian Toppserien.[1] Mmadu played for Kolbotn in Oslo, Norway, for the 2010 season, helping them to 3rd place in the Toppserien league.[2] She can be seen playing for Avaldsnes IL in an off-season tournament in Oslo on 5 February 2012[3]
Contrary to reports that she played more than 100 games for the Nigeria women's national football team, the Nigeria Football Federation has said she only played 52 games.[7]