Dr. Andrew Williams is a psychologist and biostatistician. In addition to his CTSI role, he directs the Center for Advanced Healthcare Research and Informatics in Tufts’ Institute for Clinical Research and Health Policy Studies and helps lead Tufts Medicine’s research informatics support. He is a Co-PI of multi-CTSA projects, including CHoRUS Bridge2AI and CRITICAL, and an active member of the Observational Health Data Sciences and Informatics (OHDSI) Steering Committee where he co-leads several workgroups. This work advances the standardization of valuable healthcare data and the application of best practice analytics. It also promotes the wide dissemination and reuse of innovations produced by the CTSI Informatics team and the ability of CTSI researchers to participate in broader consortial activities. For example, he collaborates with CTSI’s partners at MIT on the standardization of MIMIC, a high value intensive care data resource published through PhysionNet, by mapping it to OHDSI’s OMOP common data model. The integration with OHDSI and other OMOP-using communities such as the National Covid Cohort Collaborative also helps to improve the approach that Tufts CTSI applies to serving researchers’ requests using research support tools designed to work with OMOP. It also provides the basis for the OHDSI Vanguard Network which focuses on deployment and use of OHDSI’s oncology-focused informatics. Dr Williams leads the centralized support for the Vanguard Network that Tufts CTSI provides.