[3] On 2 April 2021, Zein scored his first senior goal against Shabab Sahel, helping his side win 3–0 in the league.

[1] His senior debut came on 4 December 2021, as a substitute in a 2–0 defeat to Algeria in the 2021 FIFA Arab Cup.

[6] On 25 June 2023, Zein scored his first senior international goal in a 4–1 win against Bhutan in the 2023 SAFF Championship.

[7] Regarded as one of Lebanon's most promising players,[8][9] Zein is a playmaking midfielder, capable of moving play from the defence to the attack.

This biographical article related to Lebanese association football is a stub.