He played for numerous Lebanese Premier League clubs, mainly at Tadamon Sour, and represented Lebanon internationally.
Zein was born in Iraq to parents from Borj Ech Chemali, Lebanon; he began playing football aged 11 in the streets of the Al-Anbar Governorate.
[2] He made his senior debut in 1995, coming on as an 80th-minute substitute against Bourj at the Saida Municipal Stadium; trailing 2–1, Zein scored a goal and assisted two, helping his side overturn the result to 4–2.
[5] He returned to Lebanon in 2008, signing for Chabab Ghazieh,[5] before moving to Islah Borj Shmali the following season.
[3] In 2002, Zein played for the Lebanon Olympic team at the 2002 Asian Games, scoring a goal in an 11–0 win against Afghanistan.