This book presents selected papers from the Proceedings of the International Conference on Geosynthetics and Environmental Engineering, ICGEE 2023, held in Jeju Island, South Korea, covering topic areas in geosynthetic applications and sustainability; civil and structural engineering; and environmental engineering and science. The published articles cover the latest research studies with the focus of discussing the relationship between geotechnical materials and environmental engineering in depth to solve complex geosynthetics issues in civil and environmental engineering. It also highlights state-of-the-art technologies adopted by the relevant industries which are not only commercially viable but also environmentally sustainable. The content of the papers appeals to researchers and industrial practitioners working in the field of geoengineering.