Dr Harry Chiririwa is an academic and researcher whose work focuses on sustainable technologies, environmental engineering, and industrial process optimization. His research is interdisciplinary, bridging engineering science, applied chemistry, and sustainability studies to address pressing industrial and environmental challenges. Dr Chiririwa actively investigates renewable and alternative energy pathways, integrating hydrogen and other green energy carriers into conventional industrial processes to improve efficiency and reduce environmental impact. A significant component of his work is dedicated to water and wastewater treatment, including the development and application of modified zeolites and other advanced materials as alternatives to synthetic resins in industrial water purification, particularly for boiler and process water treatment. He also engages in research on quality, safety, and chemical stability of functional products, such as cannabinoid-infused beverages, emphasizing clean-room processing, microbial safety, and regulatory compliance. Dr Chiririwa’s research approach is underpinned by process safety, quality assurance, and life-cycle assessment, ensuring that proposed technologies are not only technically viable but also environmentally and economically sustainable. His work contributes to both academic knowledge and practical industrial implementation, supporting innovation aligned with global sustainability and decarbonization goals.