At the age of ten, Hussein moved to Schijndel, the Netherlands as a result of the Somali Civil War.
After emigrating to the Netherlands, Saïd joined Avanti '31, making his debut for the first team at the age of 16.
In the summer of 2018, Ali Hussein joined Den Bosch on trial, however ultimately stayed at Avanti '31.
On 9 December 2019, Ali Hussein made his debut for Somalia in a 2–0 loss against Uganda in the 2019 CECAFA Cup.
[2] This biographical article related to Somali association football is a stub.