Donnellan leads the nation’s second largest MLS in Bright MLS, which serves the Mid-Atlantic region. Along with introducing new tech to support offer management and digital advertising for Bright’s 100,000 members, Donnellan also in 2024 brokered a reciprocal data access agreement with CRMLS, the nation’s largest MLS. He has previously helped spearhead a new data-monetization strategy for MLSs through the creation of REdistribute and public search portal Nestfully.