The specialized experience requirements for the GS-14 level of this position are: Leading an independent research program focused on the chemical, nutritional, or functional quality of agricultural, food, biological, or environmental materials; developing analytical approaches and establishing research priorities that advanced scientific knowledge; and publishing peer-reviewed research and providing scientific leadership through collaboration with research partners and stakeholders. The specialized experience requirements for the GS-12 level of this position are: Conducting laboratory studies to evaluate the chemical, nutritional, or functional properties of agricultural, food, biological, or environmental materials; collecting and interpreting research data and prepared scientific reports, presentations, or publications; and assisting with developing or improving analytical methods and working with others on research projects.