The National Institute of Standards and Technology (NIST) is conducting market research to identify vendors capable of providing Human Subject Participant Recruitment Services. This is a sources sought notice, not a request for proposals, and no solicitation is currently available. The government will not pay for any information received, and the results will help determine if a small business set-aside is possible. The applicable NAICS code is 541810 (Advertising Agencies) with a $25.5 million size standard. No budget, submission timeline, or performance location were specified.