Sleep medicine in Croatia has a short history, but from the very beginning, nurses/technicians have played an essential role in the development and modernization of somnology. With scarce equipment, a lack of educated medical staff in this branch of medicine and many other obstacles, nurses/technicians have slowly mastered all the techniques for diagnosing sleep disorders. Narcolepsy has been reliably and qualitatively diagnosed by conducting polysomnographic recordings and Multiple Sleep Latency (MSLT) tests despite, initially, a smaller number of patients in whom the possibility of this disorder is clinically recognized. Daily challenges and technological progress, as well as the increasing number of patients, nurses responded to efforts not only to be educated orally by doctors and senior colleagues but also demands attending professional gatherings, courses, and workshops. They quickly became an indispensable member of the working and the educational team, but without any formal education, licenses or certificates. According to the European Society of Sleep Medicine recommendations, the competencies that nurses/technicians’ shall have in diagnosing narcolepsy have been accepted by accreditation, but have not yet been officially introduced into nursing competencies. Providing licenses and certificates for nurses/technicians would ensure quality and adequate training of future team members, thus raising the work's and reports’ credibility at the international level.