Mahamad Yousif is a Postdoctoral Research Fellow at Queen’s University Belfast, a position he has held since October 2024. He received his PhD in Mechanical and Process Engineering from Queen’s University Belfast in 2025, with a thesis titled “Enhancing Poultry Byproduct Valorisation Through Efficient and Sustainable Extraction of Collagen and Keratin,” and completed his MSc at the same institution in 2020. His research focuses on waste valorisation, sustainable biomaterial extraction, circular economy strategies, and life-cycle assessment and life-cycle costing of anaerobic digestion and nutrient-recovery systems. His work aims to develop environmentally responsible and economically viable pathways for converting low-value waste into high-value products. He is actively involved in research on biomaterials, sustainable processing, and bioresource utilisation.