What is the best way to explain the C-Level the benefits of the profession of project management?

Each time I said that project management is not a profession I great mess happends inside the space or debate I said that. But if you understand what a profession is, what a discipline has to address to be consider a profession, then you will see that. On the other side, I think that each person who performs project management activities must contribute to help organizations in visualizing the role as a profession, no matter it formaly is not that.

Sean, What about starting with the idea that "organizational PM can help them meet their corporate goals with less waste, day to day tracking and reliability". C-Level leaders are interested in execution of their vision and if you position organizational PM as the tool to execute their vision in a more effective and efficient way, you will have their ears. All the best, and let us know how you end up doing it. I am assuming you are about to embark upon a persuasive show and tell to a C-suite team.

Would you change the language and terminology you use?