3x founder

Sam Steyer

AI Applications

Co-founder

Onsite Pro· Summer 2021 🇺🇸 San Francisco, California, United States

in LinkedIn 𝕏 @SSteyer41

2026Head of Product· Halcyon

Founder · since 2017

Company

Halcyon

Role

Head of Product

current

Stage

—

no public source

Raised

—

no public source

Based

San Francisco, CA

current

Founder / co-founder — the company's markEmployee / research role

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

Onsite Pro

Revolutionizing digital selling within HVAC

Summer 2021

Experience

Career

Halcyon
Head of Product · San Francisco, CA · 2026 – Present
2026
Halcyon
Head of Data Science · San Francisco, CA · 2024 – 2026
2024
Greenwork
Co-founder
Co-Founder and Advisor · San Francisco, California, United States · 2023 – 2025
2023
Greenwork
Co-founder
Co-Founder and CEO · San Francisco, CA · 2020 – 2023
2020
Y Combinator
Co-founder
Batch Member · San Francisco, California, United States · 2021
2021
Tom Steyer 2020
Surrogate & Family Liaison · San Francisco, CA · 2019 – 2020
2019
Station A
Co-founder
Co-Founder & Head of Analytics · San Francisco, CA · 2017 – 2019
2017
NRG Energy
Head of Analytics - Station A Group · San Francisco, CA · 2018
2018
NRG Energy
Product Manager, Energy Analytics - Station A Group · San Francisco, CA · 2017 – 2018
2017
NRG Energy
Engineering and Product Analyst - Station A Group · San Francisco Bay Area · 2015 – 2017
2015
AutoGrid Systems
Summer Intern - Analytics · Redwood City, CA · 2014
2014
The 2Seeds Network
Project Coordinator · Dar es Salaam, Tanzania · 2012 – 2013
2012
Advanced Energy Economy (AEE)
Analyst · San Francisco, CA · 2011 – 2012
2011
J.P. Morgan
Summer Analyst · New York, NY · 2010
2010

Bio

Sam was Cofounder and CEO of Greenwork (S21), and left a full-time role in Nov 2023, with Gautam becoming CEO. He now leads Data Science at Halcyon (https://halcyon.eco). Before Greenwork, Sam worked as a surrogate speaker on his dad Tom Steyer's presidential campaign. Previously, he was Cofounder and the Head of Analytics at Station A, and he spent the earlier years of my career in data science roles in climatetech.