The OIST Center for Quantum Technologies (OCQT) hosted the 2nd International Workshop on Quantum Information Engineering (QIE2025) from October 8–10, 2025. Nearly 60 participants—including invited speakers, organizers, and attendees from seven countries and 25 institutions—gathered to share the latest research in quantum computing, networks, algorithms, sensing, middleware, and novel quantum systems. The workshop featured oral and poster presentations, fostering discussions on the current state and future directions of quantum information engineering. Co-organized by JSAP, OIST, and several Japanese research centers, QIE2025 highlighted OIST’s commitment to advancing global collaboration in quantum technologies.