In this thesis the affect of individuals who possess the characteristics of the Dark Triad on the organization and employees is examined. The terms of the Dark Triad and it's components (subclinical psychopathy, subclinical narcissism and machiavellianism) are descripted as well as the relation between the Dark Triad and Big 5 personality traits, HEXACO model, Wiggins interpersonal circumplex, the impact of the Dark Triad on organizational culture, values and climate, managerial style, followed by mobbing, it's recognition, the consequences it leaves, intervention, prevention and the impression management tactics. A qualitative research was conducted with the method of semi-structured interview on a sample of 10 participants, average age of 32 years old that had been in a working environment with individuals who showed traits of the Dark Triad in minimum duration of 6 months, with the goal of getting a better insight about the impact of the Dark Triad on the employees and the organization. The results show that the Dark Triad leaves more negative consequences than positive, as was expected. The research provided a deeper insight into employees' experiences with individuals who possess traits of the Dark Triad, of which an analysis has been made.