This is a Sources Sought Notice for market research, not a solicitation, seeking input from qualified small businesses under NAICS 541990 to provide comprehensive data management support for the National Heart, Lung, and Blood Institute’s clinical research program. The contractor must supply a team of 20 full-time Clinical Data Managers to handle research data activities, quality assurance, database management, and transplant-related data tasks at the NIH Clinical Center in Bethesda, Maryland, with some work at other U.S. sites. The anticipated contract includes one base year and four option years, totaling five years, with a 30-day phase-in period after award and a 90-day phase-out plan before expiration. No budget amount is specified. Interested small businesses must submit capability statements by 3:00 p.m. Eastern Standard Time on June 15, 2026.