Engagement is a widely recognized concept globally, crucial for assessing and predicting job and organizational performance. However, some question the need for new constructs that resemble established ones. Similarly, workplace spirituality varies in academic definitions, challenging its validity. Yet, emerging literature suggests a clear link between spirituality at work (SAW) and engagement at work (EAW), both connected to the human spirit, albeit unexplored empirically. This research aims to establish epistemological congruence between EAW and SAW. Drawing on existing literature emphasizing their similarities, this study integrates them as 'Engagement of Human Spirit at Work' (EHSW). Analyzing two data samples (n1=166, n2=253 respondents) confirms a robust EHSW nomological network with interrelated antecedents and consequences. This study advances EHSW literature, strengthening the theoretical foundations of engagement and workplace spirituality. This study also discusses theoretical implications, bolstering these domains within academic discourse.