Meet the Down to Earth Team

Our team meets at the intersection of chemistry, construction, and climate science. Together we are building a circular economy around underutilized biomass, while decarbonizing cement and the built environment in the process.

Co-Founder & CEO

Jose Urizar

B.S. Civil Engineering California Polytechnic State University San Luis Obispo

Co-Founder & CTO

Tanner Jolly

B.S. Materials Engineering California Polytechnic State University San Luis Obispo

Tanner received a BS in Materials Engineering from California Polytechnic State University San Luis Obispo where he focused on organic chemistry and materials. While at Cal Poly he developed the Clearwash process during his senior project which produced a research paper that can be found on the Cal Poly commons portal titled "Selective Depolymerization of Industrial Hemp and its Effects on Thermal Resistivity. Concurrent to the research, he filed the first set of provisional patent applications in 2017 that would later be converted into the nonprovisional patent (US #11,512,427) granted in the US in November of 2022, and a second international patent pending application (WO2021168115A1).
Director of Strategy

Steve Burrows


Steve Burrows is an accomplished leader in the built environment focused on change as a response to a carbon constrained future, social justice and technological disruption.
Steve was a Director of Arup, Sr VP at AECOM, EVP at WSP, and Executive at Katerra.

Advisory Board

Bruce J Christensen

Concrete Chemistry and Manufacturing

PhD Materials Science Northwestern
President at Master Builders Solutions

George Reimann

Supply Chain

Director of Procurement at EMCOR Facilities Services

DTE Materials Logo - Sustainable Building Materials & Insulation - Hempcrete Block Manufacturer

Thomas Azwell

Environmental Science and Public Policy

PhD Environmental Science UC Berkeley
Founder at FIRE Foundry