Benjamin's dissertation research is focused on global health care quality measurement and performance improvement, including developing an LLM-powered scalable knowledge assessment instrument, and he remains at the forefront of statistical programming and research reproducibility practices in global health.

Benjamin's prior research at the World Bank Group and Georgetown University focused on the delivery of high-quality health care, especially in low- and middle-income contexts. His work has developed the theory and implementation of direct measurement of health care provider knowledge, effort, and practice.