What is a Global Mobility Expert?

Courtney Ellis-Jones asks how you would determine whether you think someone is a "global mobility expert."  How would you define a "global mobility expert?"

Karen O’Brien, global mobility director at AECOM, had this to say: “A GM expert is someone with deep knowledge and significant experience across a broad spectrum of industries and locations. It is someone who regularly presents on GM topics and or writes articles. An expert would be seen as a trusted advisor and also seen as a thought leader in their company and in the wider GM field.”

Courtney goes on to declare that in an increasingly global world, the importance of the global mobility professional is more apparent than ever. There is a pool of knowledge that is both deep and wide across many fields like remuneration, expatriate and corporate tax, immigration, supply chain, talent management, duty of care, culture...and the list goes on.

How do you differentiate yourself to show you are also an expert?