Club Career

Saief began his professional career with Bnei Sakhnin in 2011, before he was transferred to Hapoel Haifa one season later. The next year, he moved to Hapoel Ironi Kiryat Shmona and reached the final of the Israel State Cup. Saief made only two appearances however, which resulted in a transfer to Ironi Nir Ramat HaSharon. There he gained more playing opportunities.

Saief attracted the attention of Belgian Pro League team K.A.A. Gent, who signed him for a three-year deal in August 2014.

At the opening of the winter transfer window in January 2018, it was announced that Saief moved to Belgian league rivals Anderlecht on loan.

In May 2018, Anderlecht decided to make Saief's loan permanent.

International Career

While originally representing Israel, Saief made the switch over to the United States after being called up by the team as part of their 40-man preliminary roster for the 2017 CONCACAF Gold Cup. As part of his callup, Saief filed a one-time switch with FIFA, tying him permanently to the US program.

On June 22, 2017 U.S. Soccer confirmed that Saief had been approved by FIFA for a change of association.