The global account director needs to be globally minded. After all, they're responsible for managing all of a company's accounts worldwide and making sure that standards of quality and customer support are equal for all of their high-profile clients. Global account directors are crucial in helping big clients manage their operations and increasing transparency and cohesion in a company's transactions.
Thankfully, the global account director does not need to do all of the work themselves. They oversee a whole staff dedicated to coordinating global accounts and managing every one of a country's worldwide operations. That doesn't mean that the global account director doesn't have to pick up the phone themself sometimes to try and lure in a high-profile client or build relationships with other executives.
It's almost impossible to become a global account director overnight. Many global account directors first get a bachelor's or even a master's degree, usually in business. They also have years of experience as account executives or account managers.