This research is designed to determine the most utilized and effective leadership style based on the actual practices, preferences of the employees in construction agency. Personnel from several sections (i.e. Maintenance, Operations, Construction) of the National Irrigation Administration – UPRIIS Division V participated in the study, and data were acquired using a survey questionnaire. It consists of 40 questions designed to elicit information regarding leadership styles, performance, and outcomes. These extensive questionnaires were administered to provide context for the leadership style employed by the Engineering Managers of the National Irrigation Administration – UPRIIS Division V. The leadership style under consideration is based on four (4) contingency theories of leadership, namely The Fiedler's Model, Situational Leadership Theory, Path -Goal Theory, and Leader-member exchange (LMX) Theory. The study data was extens ively evaluated, and each question was investigated to generate a successful outcome. The finding showed that the effectiveness of a leadership style is strongly tied to the leader ship style used by immediate leaders and the maturity level of the workforce. Other factors to examine include the workplace environment, current events, the work arrangements used, and the well-being of the personnel.