Donnellan leads the nation’s second largest MLS in Bright MLS, which serves over 94,000 members in the Mid-Atlantic region, with a steady, clear focus on innovation and serving members. In 2021, he led Bright’s initiative to launch the Bright MLS T3 Home Demand Index (built in partnership with T3 Sixty, the publisher of the SP 200), which provides members a forward-looking view of the market with comprehensive, real-time MLS data. He is also a member of the MLS think tank MLS Roundtable.