Sam Steyer

Head of Product, Halcyon | Making AI Tools for the Power Sector

San Francisco, California, United States

About

Two-Time Founder and Climatetech Person now focused on Applied AI. Personal website: https://samsteyer.com

Experience

  • Halcyon (San Francisco, California, United States · On-site)
    • Head of Product
      Feb 2026 - Present · 5 mos

    • Head of Data Science
      Jan 2024 - Feb 2026 · 2 yrs 2 mos

      Working with a fantastic team to bring AI and Data tools to energy companies.

  • Greenwork (5 yrs 5 mos)
    • Co-Founder and Advisor
      Nov 2023 - Dec 2025 · 2 yrs 2 mos

      Left CEO role in Nov 2023. I now support my awesome Co-Founder Gautam as he leads Greenwork's next evolution, as Onsite Pro.

    • Co-Founder and CEO
      Aug 2020 - Nov 2023 · 3 yrs 4 mos

      We help climatetech companies build a national network of the top construction contractors 🛠️⚡️ Greenwork offers the most detailed data on electrical, HVAC, solar, and other electrification contractors. We’re working to make construction a net-zero carbon emissions industry. We also want it to grow in other ways: for us to build more homes, bigger shared buildings, and more beautiful structures, while offering construction workers great jobs with good, equitable pay. www.joingreenwork.com

  • Batch Member at Y Combinator
    Jun 2021 - Sep 2021 · 4 mos

    Member of Summer 2021 Batch as Co-Founder of Greenwork

  • Surrogate & Family Liaison at Tom Steyer 2020
    Jul 2019 - Mar 2020 · 9 mos

  • Co-Founder & Head of Analytics at Station A
    Jan 2017 - Jul 2019 · 2 yrs 7 mos

    Developed and productionalized models for things like estimating buildings energy use curves and evaluating the economics of solar and batteries for large lists of customers. As one of four co-founders, helped to raise our first round of financing and land our first 10+ enterprise customers.