Dr. Andrew Williams is a Co-Leader of Tufts CTSI’s Informatics Core, an Assistant Professor of Medicine at Tufts University School of Medicine, and Professor of the Practice in NU’s Bouvé College of Health Sciences. Dr. Williams co-leads the Tools and Resources and Observational Medical Outcomes Partnership and Open Biomedical Ontologies (OMOP2OBO) Domain Teams in the National Covid Cohort Collaborative (N3C). He is a member of the OHDSI Steering Committee of the OHDSI community and co-leads several OHDSI working groups. Dr. Williams is a psychologist by training whose work in distributed research networks has included roles as Principal Investigator, biostatistician, and in informatics development.