Joel is a co-founder of several technology companies including Foro Energy and Rho AI. He is a Founding Investor and Board Member of Rubicon Global, Zero Mass Water, and Pie Insurance, and an angel investor in over 30 early stage technology companies including Biota Technology. He actively invests from a small institutional fund into pre-seed, seed, and Series A financing rounds. Joel is also on the team of Breakthrough Energy Ventures, supporting the Breakthrough Energy Coalition in providing long-term capital for sustainable energy technologies.

Joel is a Precourt Energy Scholar and Adjunct Professor at Stanford University. Joel received his B.S.E in Chemical Engineering from Princeton University, and his Ph.D. in Chemical Engineering from Massachusetts Institute for Technology.