Commercial Production Companies are usually based in a specific city. So when they need to film global campaigns or move from one country to another for a shoot, they often engage local experts: enter the Production Service Company or 'Fixer'.
This is a company that has expertise on the ground for below the line crew, equipment, vehicles, transportation, locations and more to help a Production Company realize its creative goals in a new territory. This is great because anyone can hire a production service company if they need to film in another country.