This is a Sources Sought notice for market research to identify potential contractors for a three-year longitudinal health study of Post-9/11 Veterans, involving survey data collection from up to 100,000 participants and subsequent data analysis. The work will be performed at the contractor's place of business, with virtual weekly meetings. The scope includes comprehensive project management, survey design and administration, data management, statistical analysis, and the creation of educational materials. Interested parties must submit a detailed capability statement and company information via email. No budget information is specified in the description.