About Greg Mushen

30 years in technology across engineering, product and GTM

Professional

Current: co-founder and CTO of Scribbl

Past: co-founder and CTO of Onder (acquired by EasyKnock)

Other notable roles I’ve held:

  • Chief Revenue Officer at DevHub
  • VP of Product at Angi
  • VP of Product at Outreach
  • Head of Global Flights Shopping Product at Expedia
  • Founding member of the AI team at Compass

Education: University of Washington, BA

Personal

Outside of technology, I love food, cooking, and photography. All the photographs on this site are my own.

I’m also interested in quantitative genealogy—using data to explore family history and the historical forces that shaped it.

During the pandemic, I restored a vintage mid-century modern hotel on the Washington Coast. I subsequently automated much of the hotel’s operations with custom AI agents and workflows.

My father was an MD and planted the seed of my curiosity about health. Over the past few years, I’ve become especially interested in understanding why hunter-gatherer societies don’t experience the same patterns of chronic disease that we do.

A question I keep coming back to: could high activity levels and energy flux help explain why patterns of chronic disease differ between hunter-gatherer societies and our own? I research this extensively, and it’s often the subject of my podcast appearances.

I explore “Flux Theory” as one possible explanation in this conversation on the Levels podcast. That curiosity also informs my advocacy for high levels of physical activity, especially walking.

Dark Lab

I also publish Dark Lab, an independent research project built around a simple idea: use the literature as the lab. I use AI to explore overlooked studies, paradoxes, and null results—findings that may reveal gaps in how we explain the world.

The mission is to turn those findings into testable hypotheses, publish the reasoning, and invite others to challenge and refine it. It’s a place to explore ideas openly and make them precise enough to be tested.

Go deeper

I explored these ideas in a ten-part series on X: Why Don’t Hunter-Gatherers Have Heart Disease?

Explore all ten parts
  1. Part 1 - Diet and Heart Disease Across Populations

    Comparing populations with different diets and patterns of heart disease.

  2. Part 2 - Lipid Clearance and Physical Activity

    Lipid profiles, clearance, and the role of physical activity.

  3. Part 3 - Diet, Genetics, and Exercise

    How diet and genetics fit alongside exercise and clearance.

  4. Part 4 - Daily Walking vs. Endurance Exercise

    Daily walking versus a shorter bout of endurance exercise.

  5. Part 5 - VO₂max, HIIT, and Daily Walking

    VO₂max, HIIT, and whether fitness can replace daily walking.

  6. Part 6a - Insulin Resistance in the Maasai

    Insulin resistance and the Maasai example.

  7. Part 6b - Urbanization and Insulin Sensitivity

    The Maasai, urbanization, and changes in insulin sensitivity.

  8. Part 6c - The Pima: Shared Genetics, Different Lifestyles

    The Pima: examining lifestyle changes with a shared genetic background.

  9. Part 7 - How Insulin Resistance Progresses

    Patterns of insulin resistance and their progression in modern populations.

  10. Part 8 - Bringing the Model Together

    Bringing the observations together into a proposed model.

  11. Part 9 - Visceral Fat and Insulin Resistance

    Visceral adipose tissue and its relationship to insulin resistance.

  12. Part 10 - Returning to a Subsistence Lifestyle

    What happens when people return to a subsistence lifestyle?