“…We analyse the moderating role of the within-nationality cultural background of leaders, as prior studies suggest that it might play a role in the effective coordination of complex social systems (Love, Edwards, and Irani 2008;Chung, Ko, and Kim 2020;Marques-Quinteiro et al 2022), which is one conception of construction projects as TOs that limited research has been performed around it. Our study also addresses the research gaps highlighted by Marques-Quinteiro et al (2022), Joseph and Van Buren (2021), Ojiako et al (2023), and Garengo and Betto (2022) regarding supportive climate, culture, team coordination, leadership, and team performance in TOs. It aims to advance the model of relational leadership behaviour in multicultural TOs.…”