Berkeley Prosopography Services (BPS) provides a new set of tools for prosopography - the identification of individuals and study of their interactions - in support of humanities research. Prosopography is an discipline well-served by digital tools; it is a humanities discipline in which the computational and data-driven methods at home in “Big Data” research can transform scholarly workflows, regardless of the size of the datasets. BPS is based upon re-usable infrastructure, supporting generalized web services for corpus management, social network analysis, and visualization.