It is especially lonely at the top for Lisa W. Wardell. She’s the only Black woman in charge of a publicly traded U.S. company.
Ms. Wardell runs Adtalem Global Education Inc., a provider of degrees, certificates and continuing education for the health-care and financial-service industries. The coronavirus pandemic complicated her command of a far-flung empire that operates in 21 countries. The chief executive quickly closed Adtalem’s 26 campuses and swelled its ranks of online students by 60% to 40,000. A few campuses soon…