Who Is Green Cement Inc.?


To transform byproducts and natural minerals into sustainable products that eliminate the greenhouse gas emissions from cement while making it stronger and more economical


To transform the cement industry into a net-zero carbon emitter – saving 4 billion tons annually of CO2 emissions


  • Integrity and Excellence in everything we do
  • Customer Focused: Serve our customers through the highest quality products and services.
  • Health, Safety, and Sustainability: To promote a healthy work environment that includes respect for people and the environment
  • Collaboration as a team to achieve our vision for the company

Technology Leader

In 2020, GCI invented a method and chemistry that greatly enhances the reactivity of natural pozzolans. Natural pozzolans meet regional fly ash shortages.

Portland cement rapid set time now matched by GCI enhanced natural pozzolans without the carbon footprint. 

Short-term strengths of GCI match Portland cement, while 28-day strengths are 20% stronger than Portland cement.  

GCI Pozzolanic Cement:

  • No carbon emissions
  • Strength performance equivalent
  • Greater durability
  • Lower cost
  • Improved flow characteristics

Our Team

John T. Preston

John T. Preston


Managing partner for TEM Capital. Has 40+ years of technology-based entrepreneurship experience, including 30 years at MIOT. Testified before Congress 7 times as an expert. Advised Presidents Clinton and G.H.W. Bush on technology. BS Physics Univ. Wisconsin, MBA Northwestern.

Grant Quasha

Grant Quasha

Chief Executive Officer

Previously oversaw investments and operations of GFG Alliance's North American Metals, which employs 1,500 people and revenues approaching $1B. BA from Harvard College, Cum Laude, and an MBA with Distinction from Harvard Business School.

Clinton Pike

Clinton Pike

EVP and Chief Technology Officer

Clinton Pike, EVP and chief technology officer. Has 40+ years of experience in the power industry including managing byproducts. Extensive research experience in pozzolanic materials and inventor of 20+ patents. BS in Chemistry and Biology, Georgia Southwestern.

Danny Gray

Danny Gray

EVP Strategy and Operations

Has 40+ years of experience in the power industry and construction products. Graduated with honors from Virginia Tech with a BS in Civil Engineering. Served on the advisory board for DOE and testified before congress as an expert.


David McNitt

Director Of Technology

20+ years in the cement industry managing quality, product development, and research. BA Chemistry, Northern Colorado.

Joe Brent

Joe Brent

Plant Manager

Plant manager with 20+ years of experience managing manufacturing and processing of construction materials, following his military service.


Myvan Huynh


10+ years in accounting for oil and gas manufacturing and production. BS Finance, California State.

Contact Information

Production Facility:
Joe Brent

Corporate Office:
My Huynh