The Proceedings of the 1st International Conference on Sustainable Communication, Machine Intelligence, and Metaverse (SCMIM) - 2025 serve as a comprehensive compilation of state-of-the-art research, innovative solutions, and insightful discussions presented during the conference. It covers a variety of topics within three main areas: sustainable communication technologies, machine intelligence and decision analytics applications, and metaverse paradigms. This collection is a valuable resource for researchers, industry professionals, and academics, offering detailed analyses and practical insights into the latest advancements in sustainable communication, AI-driven decision analytics, and the expanding field of the metaverse. With contributions from leading experts worldwide, the proceedings will provide a rich repository of knowledge and act as a catalyst for future research and development in these transformative domains.