This is a Request for Information (RFI) for market research only and does not constitute a formal solicitation. The Department of Homeland Security Science and Technology Directorate (DHS S&T) requires professional scientific and technical assistance services to support its research, development, test, and evaluation portfolio. The required support spans a wide spectrum of disciplines including cybersecurity, data science, artificial intelligence, engineering, and various physical and life sciences. No location for the performance of services is specified.