About the Author
Tomás J. Aragón is the health officer of the City and County of San Francisco, and director of the Population Health Division (PHD) at the San Francisco Department of Public Health.1 As health officer, he exercises leadership and legal authority to protect and promote health. As PHD director, he directs public health services. His focus areas include health equity, lean enterprise transformation, collective impact, data science, and leadership development. He teaches population health data science (with R) at the University of California, Berkeley School of Public Health, and maintains a public health blog with a practiced-based focus on population health leadership, lean, and data science at https://taragonmd.github.io/.