The college graduated brazilian workforce has been showing a growing interest to occupy positions in Brazil’s public companies. This phenomenon reflects not only an intention of the labor force newcomers to fill in these opportunities, but also a migration of professionals that used to act in private organizations and decided to enter the public sector. This growth in interest for the public area is explained by the existence of a group of factors, important for the workers, that would be better accomplished in this sector. Among these factors, there’s a need from the worker to manage his/her own time, salary, stability and prestige. This research’s objective was to understand the most important points that built the psychological contract’s basis established between a public company and its workers that were previously employed in the private sector, what would explain the growing interest for these companies. To reach this objective, a qualitative research was made, in which nine employers from three different brazilian federal enterprises were interviewed. These interviews were based on a semi structured questionnaire with wide content questions that intended to give the interviewee the possibility to cooperate with the subjects that he/she understood as the most relevant. Through these interviews, the researcher looked after to understand the three steps that underlie the public worker’s psychological contract, according to the template designed by Côrtes e Silva (2006). The result was wide and embraced not only the expectations that involved initial moment of the contract, but also the terms that have been added through the worker’s relationship with the company.