This letter certifies that Mr. Ramin Vaghei served as a teaching assistant from 2013 to 2015 for postgraduate civil engineering courses at Universiti Putra Malaysia, including Structural Dynamics, Finite Element Method, and Earthquake Resistant Building. The letter states that Mr. Vaghei has appropriate teaching skills, is capable of problem-solving in the classroom, and able to organize students and prepare them for study. The senior lecturer provides contact information in case of any further inquiries.