As noted on MacRumors, the job description for the local experts is as follows:
The Maps team is looking for people with a passion for mapping, great testing skills, and deep regional knowledge to help us build better and better maps. In this position, you will be responsible for the quality assessment of Apple Maps for your region, including both data and map services. You will monitor changes to our maps, provide feedback on unique local map requirements, collect ground truth information, and evaluate competing products.
Applicants need to have a bachelor's or equivalent college degree, experience in quality assurance, and "detailed knowledge of the unique features of your local area, including preferred place names, prominent businesses, public services, seasonal events, driving routes, landmarks, and road names."
The hiring will provide additional accuracy to Apple's maligned mapping service. Back in March, the company hired a group of managers to head up the new Maps Ground Truth team.