The increasing expansion of the social activities accomplished by the Not-Governmental Organizations has been a constant in the societies contemporaries, this model of social intervention brings as deep cloth of the redefinition of the paper of the State, social ally to the predominance of the marketing logic and its consequences. In Brazil the scene is not different, in the measure where the State legitimizes the action of these ONGs by means of the establishment of partnerships that they make possible that its responsibilities are repassed and thus developed through to take the effect of social actions co-ordinate by the ONGs. In this thesis the objective is to trace the profile of Organization-Not-Governmental of Manaus AM, as well as of the professionals of Social Service who act in these ONGs, in order analyzing the limits and the challenges taxes to these professionals. For in such a way, a research with the Social Assistants will be made who develop its work next to ONGs that they keep accord with the State secretary of Social Assistance of Amazon (Brazil). To give theoretical support to the constant reflections in this work, a bibliographical and documentary survey concerning the subject was carried through, object of this study. Thus, one concludes briefly that the Social Service was not immune to the society changes, but that it suffers directly, either in the solicitations that are directed to them, either for the changes in the slice of the work market that fits to it, the impacts generated for the relations that if establish between State, market and society, that goes if (reverse speed) constructing in the present time.