Our Staff

Erika Rissi

Credit: E.Rissi

Chief Evaluation Officer and Evaluation and Assessment Capability Section Head  (Acting) | 703-292-4525

Talk to me about

  • Merit Review studies, reports, and pilots
  • PI and reviewer customer experience surveys
  • NSF’s Learning Agenda and annual evaluation plan
  • Integrating strategy, planning, and measurement


Erika Rissi is the Chief Evaluation Officer and Evaluation and Assessment Capability Section Head (Acting) at the National Science Foundation where she leads policy analyses to study and develop evidence-based recommendations for enhancing the NSF merit review process. She is also responsible for development of the agency’s Learning Agenda and annual evaluation plan, ensuring that evidence-building activities are focused on the most pressing questions to help NSF advance its mission. Ms. Rissi has had numerous NSF positions that brought together her experience in strategy design, strategy execution, and operations. She oversaw the strategy for modernizing NSF's legacy proposal and award management processes and systems and was the business lead for She designed and led a process for creating an agency reform plan, Renewing NSF, that incorporated ideas generated through agency-wide brainstorming sessions. Ms. Rissi developed surveys administered to 100,000 NSF customers to measure satisfaction, identify end-user critical IT needs, and evaluate changes to NSF’s process for the merit review of proposals. Prior to joining NSF, she held positions as a strategy management consultant with firms focused on public sector clients, including Grant Thornton, SRA International, and Touchstone Consulting Group, where she advised C-level executives on grants management and policy, human capital, financial management, and agency management and operations. Ms. Rissi earned a B.A. in music from Yale University.

Greg Anderson

Photo of Greg Anderson
Credit: G.Anderson

Senior Advisor for Strategy and Evaluation (Acting) | 703-292-4693

Talk to me about

  • Merit review process and policies
  • Interdisciplinary and convergence science program design and oversight
  • Advisory, oversight, and governance boards and committees


Greg Anderson is Acting Senior Advisor for Strategy and Evaluation at the National Science Foundation, on detail from Section for Arctic Sciences in NSF’s Office of Polar Programs. Since joining NSF in 2009, he has served in multiple roles leveraging his expertise in multidisciplinary Earth science, major facility oversight, and planning and managing complex scientific programs. He has been responsible for multidisciplinary and convergence research programs; overseen two of NSF’s major facilities and one independent center; participated in multiple agency-wide groups focused on NSF’s merit review process, workforce, and facilities oversight; and was a member of interagency groups on natural hazards, Earth-observing satellite needs, and Arctic sciences. He served for three years as co-Executive Secretary for the National Science Board Subcommittee on Facilities and Committee on Awards and Facilities and 18 months as Section Head for Integrated Activities in the Division of Earth Sciences.  More recently, he co-led a cross-NSF group that developed a decision support tool to assist agency staff and leadership in choosing an appropriate funding model for complex cross-organizational activities. He currently represents NSF as co-chair of the steering committee for the Interagency Arctic Research Policy Committee’s 2023-2025 Biennial Implementation Plan. Prior to joining NSF, Dr. Anderson held positions at the University of California, San Diego; US Geological Survey; UNAVCO; and the Swiss Federal Institute of Technology in Zürich. Dr. Anderson has a Ph.D. in Earth Sciences from the University of California, San Diego.

Christina Freyman, Ph.D.

Credit: C.Freyman

Evaluator | 703-292-2835

Talk to me about

  • Measurement of partnerships
  • Metrics related to R&D
  • Science policy
  • Text analytics and other computational approaches to measurement


Christina Freyman is an evaluator at the National Science Foundation. At NSF, she employs various algorithmic techniques to obtain evidence for decision making from NSF’s administrative data systems, including the measurement of partnerships and broader impacts in the NSF portfolio.  She also oversees or supports various evaluation and monitoring projects related to federal government investment in R&D. Prior to joining NSF, she was the principal investigator on grants related to advanced analytics, big data, and metrics related to evaluation. She has also conducted mixed methods evaluations of government sponsored R&D with quantitative economic analyses and program evaluation tools including machine learning-based text analysis and bibliometric analyses.  Dr. Freyman has a Ph.D. in materials science and engineering from Northwestern University and a M.P.P. from the University of Chicago.

Cecilia Speroni, Ph.D.

Credit: C.Speroni

Evaluator | 703-292-7242

Talk to me about

  • NSF’s Education and Training Application (ETAP)
  • NSF’s STEM workforce / human capital development programs
  • Broadening participation
  • Rigorous evaluation designs, such as experimental and well-matched quasi-experimental designs


Cecilia Speroni is an evaluator at the National Science Foundation and a research affiliate at the University of California, Santa Barbara. At NSF, she supports various evidence-building activities, including leading the development and pilot testing of a data collection system designed to support NSF’s human capital development programs. Prior to NSF, Dr. Speroni was a senior researcher at Mathematica for 10 years where she designed and led large-scale impact evaluations in K-12 and higher education for federal agencies, state government agencies, and foundations. She has evaluated a variety of human capital development efforts, ranging from an evaluation of mentoring approaches to connect workers with training opportunities, to advanced high school curricula to improve college access, and studies of college summer enrichment programs for minority students to diversify the health and scientific workforce. She has also served as the deputy director of STEM research at Mathematica, where she helped manage the research portfolio. Prior to her tenure at Mathematica, she has worked at the American Institutes for Research and the Community College Research Center on a wide range of education policy topics, including the high-school-to-college transition, bilingual education, and adequacy and equity in education financing. Dr. Speroni earned her doctorate degree in Economics and Education, with distinction, from Columbia University. She is a certified reviewer of the Institute of Education Sciences’ What Works Clearinghouse to assess the quality of empirical studies, and her research has been published in top peer-reviewed journals such as American Economic Review (Papers and Proceedings), Journal of Labor Economics, and Labour Economics.

M. Taylor Rhodes, Ph.D.

Credit: T.Rhodes

Evaluator | 703-292-7301

Talk to me about

  • Econometric methods
  • Theories of change / logic models
  • Data management


Taylor Rhodes is an evaluator at the National Science Foundation. He has extensive experience in the areas of program evaluation, research and data analytics, and econometric methods. At NSF, Taylor serves a technical representative for research efforts, performs quality assurance reviews, and examines technical skills and training interest. He has held previous federal positions at the U.S. Department of Labor, U.S. Department of Treasury, U.S. Department of Agriculture and academic positions at Oregon State University, University of Nevada at Las Vegas, College of Coastal Georgia, Lawrence University, and Bennett College. Dr. Rhodes has a Ph.D. in economics from the University of North Carolina at Greensboro and his research has been published by World Nutrition, Public Health Nutrition, Food Protection Trends, and the American Economist.

Robyne McRey

Credit: R.Mcrey

Portfolio Manager | 703-292-8294


Robyne McRey is the portfolio manager of EAC, where she monitors portfolio progress and performance and promotes EAC’s organizational planning and goals. Prior to joining EAC in 2020, Robyne provided program management activities for NSF’s Division of Information Systems and supported NSF’s CIO from 2007-2020. Prior to joining NSF, Robyne worked at the Department of Housing and Urban Development in various capacities from 1991 to 2007, including performing the role of the primary formula allocation specialist at the Office of Community Planning and Development.