Editor: Anastassios Nanos Authors: Cyril Hsu, Chrysa Papagianni, Anestis Dalgkitsis , Marios Avgeris (UVA), Luis Velasco, Marc Ruiz, Jaume Comellas, Sima Barzegar, Davide Careglio, Josep Prat (UPC), Carlos J. Bernardos (UC3M), Vincent Lefebvre, Mark Agoustures (TSS), Alessandro Pacini, Luca Valcarenghi, Andrea Sgambelluri (SSSA), Anastassios Nanos, George Ntoutsos, Christos Panagiotou, Konstantinos Papazafeiropoulos, Maria Gkeka, Maria Goutha, Charalampos Mainas, Apostolos Giannousas (NUBIS), Chamith Mawela, Chathuranga Weeraddana (UOU), Sultan Ertaş, Merve Saimler (EBY), Michele Gucciardo (NEC), Rafael López, Miguel A. Carnero (TID) Internal reviewers: 1. Chathuranga Weeraddana (UOU), 2. Vincent Lefebvre, Mark Angoustures (TSS) External reviewers: 1. Chrysa Papagianni (UVA), 2. Gergely Pongrácz (ERI-HU) Abstract This document summarizes the work in WP3, presenting the latest and final developments of the architecture of the DESIRE6G Service Management and Orchestration Layer, along with its components and the technologies used to achieve flexible and intelligent service instantiation and management on a 6G network. This document is an extension of D3.1 [1] and D3.2 [2] with the implementation of the DESIRE6G secure management, orchestration, and control platform.