It is with great pleasure and enthusiasm that the Faculty of Civil Engineering & Technology, Universiti Malaysia Perlis (UniMAP) present the proceedings of The 6th International Conference on Civil and Environmental Engineering (CENVIRON) 2023, hosted in conjunction with The Global Trends in Engineering, Science & Technology Congress 2023 (GTEST2023). This edition’s theme, “Enhancing Liveability and Sustainability through Green Technology,” highlights our dedication to investigating cutting-edge solutions that promote a more liveable and sustainable society. The hybrid conference, held on September 4 – 5th, 2023, at the Sabah Room, World Trade Centre (WTC), Kuala Lumpur, Malaysia, gathered academicians, researchers, and practitioners from around the world together. We honourably welcome our keynote and invited speakers Associate Professor Dr. Filippo Giustozzi, RMIT University, Australia and Professor Dr. Sumate Chaiprapat, Prince of Songkla University, Thailand.CENVIRON’s principal goal is to provide an effective forum for the sharing of knowledge, research findings, and technology breakthrough. This conference is critical in encouraging collaboration and creativity within the community as we traverse the ever-changing landscape of sustainability in civil and environmental engineering subjects aligned to SDG 6, 11, 12 and 17. The primary subjects addressed in this conference include, the:1. Environmental Sustainability and Green Practices,2. Water Management and Quality,3. Environmental Health and Safety,4. Urban Ecology, Transportation, and Pollution ControlWe would like to express our heartfelt appreciation to the individuals and organisations who made this event possible. Prof. Dato’ Ts. Dr. Zaliman Sauli, Vice Chancellor of Universiti Malaysia Perlis (UniMAP), and Assoc. Prof. Ts. Dr. Zulzikrami Azner Abidin, Dean of the Faculty of Civil Engineering & Technology, and the Research Management Centre UniMAP’s team deserve our warmest gratitude for their outstanding support and coordination. We also thank our valued co-organizers from Universiti Teknologi Brunei, Universitas Muhammadiyah Aceh, and Universiti Teknologi Malaysia for their combined efforts.Without the kind sponsorship of Construction Industry Development Board (CIDB), Master Jaya Green Technology, Mega Jati Academy Sdn. Bhd. and Pentas Flora Sdn. Bhd., this conference would not have been possible. Their financial assistance has significantly facilitated the expansion of CENVIRON, enabling us to provide a prestigious and comfortable venue for vital discussions and the exchange of knowledge.The conference’s geographical scope was not restricted to the physical venue alone. On September 5, 2023, we expanded our reach to the Tuanku Syed Faizuddin Putra Library, Universiti Malaysia Perlis Main Campus, Perlis, Malaysia, in addition to the World Trade Centre in Kuala Lumpur, Malaysia. This dual-location strategy sought to increase participant accessibility and participation. The conference used a hybrid strategy that included both physical and online sessions. The 11 attendees in person had a rich programme with two parallel sessions, while the 53 participants who joined remotely via the Google Meet platform had nine parallel sessions. Each presentation, including the Q&A, was allotted 20 minutes, guaranteeing a lively and participatory atmosphere.Participants, both actual and virtual, contributed enthusiastically to the various sessions hosted on the Google Meet platform. The chairpersons’ and co-hosts’ joint efforts over nine various links facilitated smooth sessions and vibrant debates. We urge you to explore the wealth of knowledge offered in these proceedings, which demonstrates the community’s dedication to furthering Earth and Environmental Science. We hope that the ideas offered during the 6th CENVIRON will spark additional study, collaboration, and technical breakthroughs for the benefit of our global community.List of Executive Committee, Organizing and Technical Committee are available in the pdf.