Hetherington leads one of the nation’s largest Century 21 affiliates in Century 21 New Millennium. The firm has 25 offices serving Maryland, Virginia and Washington, D.C. markets. It expanded into West Virginia in 2023. Hetherington, who previously served in the military, launched his first brokerage in 1990 and, with a series of acquisitions, he has helped guide growth at a company that now includes lending, insurance, title and home warranty units.