Marietta brings more than 20 years of experience to her role as senior study director, designing and implementing nationwide studies that inform policy and practice. Her expertise is in the design and management of survey data collection operations that incorporate individualized protocols to work with diverse target populations. She has developed sample management tools and activities, questionnaire design and testing, sample member outreach and prompting strategies, and interviewer training programs. Marietta has supported projects for a range of federal clients, such as the U.S. Department of Health and Human Services, the U.S. Department of Education, the National Science Foundation (NSF), and the Centers for Medicare & Medicaid Services (CMS).

Marietta leads data collection activities for several Westat Insight projects, providing expertise on survey development, recruitment strategies, and data collection methodologies. Currently, she serves as project director for the NSF Merit Review project, overseeing numerous survey and analytic support activities, including the design and data collection, analysis, and reporting activities for the biennial merit review web survey. She also serves as project director for the Federal Facilities Research and Development Survey, also for NSF, which has numerous qualitative data collection tasks. She oversees data collection for the Monitoring and Evaluation of Medicare Part C and Part D Sponsors’ Customer Service and Pharmacy Centers for CMS. She also serves as data collection task leader for the Puerto Rico Health & Well-Being Survey, a household survey to assess food security of residents throughout Puerto Rico.  

Earlier, Marietta was a senior research director at NORC at the University of Chicago, where she managed national, multimode studies with individuals, families, and institutions. She holds an M.S.W. from the University of Illinois at Chicago.