Quantum Project Management continues a journey which has spanned several decades as I first studied the unacceptably high “failure” rates of large complex projects, identified some root causes and suggested various focus areas to address the observed deficiencies. Along that journey I observed that classical project management theory failed us at scale and complexity, constrained by its founding grounded on straight-forward, decomposable projects that were well-bounded. At various points along that journey, I compared what needed to happen as being analogous to the break in thought and theory that occurred as both quantum theory and relativistic theory emerged in the physics domain. This monograph delves into an innovative theory for managing large, complex projects rooted in the principles of quantum and relativistic theories, advocating for a paradigm shift from traditional project management methodologies to more adaptive and resilient practices