The IEEE International Congress on Intelligent and Service-Oriented Systems Engineering (CISOSE 2023) was successfully completed at the Harokopio University of Athens from July 17th to July 20th, 2023. CISOSE 2023 was organized by the Department of Informatics and Telematics of Harokopio University in collaboration with the IEEE. Congrats to all involved and a special mention to Professor Iraklis Varlamis who served as a general chair!