The present study aims to identify the level of key personnel affecting construction labor productivity based on the perception of NIA employees and its contractors, the researcher also seeks the construction labor productivity of NIA. A total of 121 participants assessed the level of management of NIA key personnel, while 57 respondents provided insights into NIA's construction labor productivity. Findings indicate that the level of management among the NIA personnel gained an overall mean of 4.11 from the agency while an overall mean of 4.17 was gained from the contractor (Agree). Meanwhile, under construction labor productivity, an overall mean of 3.70 was achieved, and interpreted as Agree. Correlational tests reveal no significant links between Manpower Recruitment and any productivity factors. However, several weak inverse associations appeared: Presence/Absenteeism with Motivation (r = −0.263, p = .048); Communication with Motivation (r = −0.228, p = .033) and with External Factors (r = −0.274, p = .039); Labor Turnover with Motivation (r = −0.309, p = .019); and Trust & Relationship with Motivation (r = −0.339, p = .010) and with External Factors (r = −0.262, p = .049). Furthermore, the association between overall management level and overall labor productivity is not significant (r = −0.151, p = .261). This indicates that, management ratings do not translate into a linear, aggregate shift in reported productivity conditions. As a recommendation, the study suggests to investigate different dimensions or specific management practices rather than overall management scores, as certain practices (e.g., target setting, monitoring) may influence productivity more directly.

Keywords: key personnel, contractors, construction labor productivity, National Irrigation Administration (NIA), CALABARZON