Population Health …

Equity — Leadership — Lean — Data science

Protecting and promoting health and well-being for all in SF

Making San Francisco the healthiest place on earth

Recent Posts

Concepts for controlling microbial threats to human health

Preamble This is a work in progress. Feedback is welcome, appreciated, and valued. Introduction With the spread of novel coronavirus …

Prioritizing face masks and respirators during shortages

Preamble This is a work in progress. Feedback is welcome, appreciated, and valued. Key points In the setting of shortages, Respirators …

Decision quality, problem solving, and data science

Decisions drive vision, strategy, execution, evaluation, problem-solving, performance, and continuous improvement.1 A decision is an …

Guide for setting up your Mac OS to write technical papers

My daughter is starting college this week. We bought her a Mac Book Air. This page is dedicated to first-year college students. …

Writing technical content in Academic

Academic is designed to give technical content creators a seamless experience. You can focus on the content and Academic handles the …

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Tomás J. Aragón

Health Officer, City & County of San Francisco; Director, Population Health Division

San Francisco Department of Public Health


Welcome! I am the health officer of the City & County of San Francisco, and director of the Population Health Division (PHD) at the Department of Public Health. Striving to embody and promote the universal values of dignity, equity, compassion and humility, I work to convene, connect and catalyze communities and institutions to transform narratives, policies and systems toward a sustainable culture of equity, healing and health for all people and our planet. As health officer, I exercise leadership and legal authority to protect and promote equity, racial equity, climate action and community health. As PHD director, I direct public health services. I also teach population health data science at the University of California, Berkeley School of Public Health and I maintain this blog with a focus on equity, leadership, lean, and data science.

To subscribe to this blog follow me on LinkedIn and/or Twitter.


  • Equity, antiracism and racial justice
  • Population health and health equity
  • Leadership development
  • Lean transformation
  • Data science


  • MD (Medicinae Doctor), 1987

    Harvard Medical School

  • MPH (Master of Public Health), 1988

    Harvard School of Public Health

  • DrPH (Doctor of Public Health), 2000

    University of California, Berkeley

  • Strategic Decisions (certification), 2016

    Stanford University