Mohammad Alnayef worked for Puzant and Leon Yacoubian Trading and Contracting from July 2007 to October 2008 on the infrastructure project for Cordoba Hills Development in Aleppo, Syria. During this time, he prepared shop drawings and as-built drawings for transportation and sewage networks, and designed and supervised construction of sewage treatment plant tanks. His work was completed efficiently and conscientiously according to his employer.