Expertise in construction has typically been associated with the esoteric, where experts occupy privileged positions through their possession of specialist skills and knowledge. In this conceptual piece, an attempt is made to broaden this view of expertise found in the construction management literature by drawing on a reading of the process philosophical writings of Henri Bergson and others. Re-reading expertise from a processual standpoint, it is argued that our conceptualization of expertise in construction management should move beyond its treatment as a thing to bring to the fore expertise as an open-ended, ongoing, ever-evolving process of becoming. At the heart of this ontological shift of expertise in construction lies the emphasis on the tacit and recognition that expertise is, at the same time, interactional, intuitive and incidental. These ideas are illustrated in a vignette of environmental expertise in an airport context.