Meddah is a distinguished Canadian Associate Professor of Civil & Architectural Engineering at Sultan Qaboos University (Oman), with over 20 years of academic and research experience spanning Canada, Japan, the UK, and Oman. He holds a PhD in Civil Engineering from Sherbrooke University, specializing in concrete volumetric contractions and pore network characteristics, and has a strong interdisciplinary background in construction materials, sustainable concrete, and geopolymer technology. His research focuses on green building materials, including recycled aggregates, calcined clays, and industrial waste valorization, with over 50 peer-reviewed publications (h-index 22 in Google Scholar, 3,657+ citations) and multiple high-impact papers in Cement and Concrete Research and Construction and Building Materials.