Considering the rapid change of work and life as well as the increasing requirements of professional competences for personnel, this article, based on scientific literature, examines the concept competence and its component parts. Through an integrated multi criteria approach, the authors of this work assessed competences and their deciding factors of the naval officers of the Lithuanian Navy and, respectively, developed a complex assessment model. On the basis of the model development principles, competences and their component parts of any other profession can also be assessed. According to the results, the authors proposed adapted competence building measures for a specific vessel that would develop missing skills and increase officers’ work optimization in the existing work environment.