This research aims to explore how the introduction of Generative Artificial Intelligence (GAI) changes the roles and skills of middle managers. Anchored in an epistemological posture of critical realism, it adopts a qualitative methodology based on semi-structured interviews conducted with 60 participants in three companies: a large company (30), a medium-sized enterprise (15), and a small business (15). The approach mobilizes Activity Theory (Engeström, 1987) as a conceptual framework to analyze the organizational and managerial transformations brought about by GAI. These preliminary observations offer the opportunity to refine the analysis to better answer the central question of this research: How does the introduction of GAI change the roles and skills of middle managers? Using Activity Theory as an analytical framework, this research explores the tensions and dynamics created by the integration of GAI in organizational systems. Informal appropriation practices also emerge as a key element, illustrating how middle managers bypass traditional structures to adopt these technologies. The first feedback from the interviews provides an overview of potential transformations, without claiming generalization at this stage. These feedbacks suggest the following dynamics, to be confirmed through a full data analysis: - Upward adoption: GAI seems to foster bottom-up dynamics, challenging traditional organizational practices. - Skills transformation: A shift toward human and conceptual skills appears essential to support technological innovation. - Managerial evolution: Middle managers are emerging as potential facilitators of change, playing a key role in the strategic integration of GAI.