Welcome to Greener Concrete, LLC
Meet Our Team
University of Washington Department of Materials Science & Engineering
University of Washington Department of Materials Science & Engineering
University of Washington Department of Materials Science & Engineering
Contributing UW Research Team Members:
- Professor Dwayne Arola, Ph.D., UW MSE, PI for UW MSE
- Professor Eleftheria Roumeli, Ph.D., UW MSE
- Brandon Lou, UW MSE Ph.D. Student and Research Lead
- D. Marcus Uhm, UW MSE Student and Undergraduate Research Assistant
- Josh Lin, UW MSE Research Team (2022 to 2024)
- Kunthea Deng, UW MSE Research Team (2022 to 2023)
- Renjie Song, UW MSE Research Team (2022 to 2023)
- Dan Uhm, MBA, PI for Greener Concrete
- UW Department of Civil and Environmental Engineering
Zeolite Composites, LLC
University of Washington Department of Materials Science & Engineering
University of Washington Department of Materials Science & Engineering
Zeolite Composite, LLC
Our singular mission is to improve the health of our planet for the benefit of all.
We will accomplish this mission by mitigating climate change and the lingering effects of hazardous materials through the application of zeolite-based technologies that are effective, affordable, and scalable.
Our primary focus is zeolite applications that reduce both carbon and methane emissions while facilitating carbon capture at scale.
Smarter Solutions for Sustainable Change™
Zeolite Makes the World Better™
Dan Uhm, MBA
University of Washington Department of Materials Science & Engineering
Thomas Yang, MD, MBA
President
Dan is currently focused on developing and supporting several renewable/clean energy projects and climate change initiatives. Dan is a graduate from the University of Washington with a degree in engineering. His professional career began with the Central Intelligence Agency, followed by Kyocera of Japan. Dan holds multiple U.S. and foreign patents in fiber optics. After receiving his MBA, Dan managed multimillion dollar international joint ventures and strategic corporate projects for Alcatel of France. Following a 10-year career with Alcatel, Dan founded a start-up company that became an industry pioneer for high resolution digital archiving of movie film. Dan is a Co-Founder and Managing Partner at Seattle Wealth Management.
Email: Dan@ZeoliteComposites.com
Thomas Yang, MD, MBA
Thomas Yang, MD, MBA
Thomas Yang, MD, MBA
Executive Vice President
Tom is a respected physician and has been practicing in the Seattle area for over 20 years caring for patients as well as performing clinical research with multiple publications. He completed his MBA from the Foster School of Business graduating with honors and is a Co-founder of Secure Med Info, Aztec Premium (AP brand), 4D Armor, Armor4Me (A4M brand), and AgriNutrient. Tom is Board Chair for Immanuel Children’s Foundation and has led several volunteer teams from UW to Guatemala to install off grid solar for remote villages.
Email: Tom@ZeoliteComposites.com
Neil Amrhein
Thomas Yang, MD, MBA
Thomas (Tom) Gilman
Senior VP of Business Development
Neil is located in Seattle, WA and brings over 25 years of engineering, sales and startup experience to the task of improving the health of our planet. Neil graduated from Santa Clara University with a Mechanical Engineering major and Mathematics minor, and later graduated from Stanford University with a masters degree in Industrial Engineering and Engineering Management. He has held a wide variety of roles during his career, but current focus areas include funding, product development, market development and special projects.
EMAIL: Neil@ZeoliteComposites.com
Thomas (Tom) Gilman
Thomas Yang, MD, MBA
Thomas (Tom) Gilman
Brandon Lou
D. Marcus Uhm
D. Marcus Uhm
UW Research Lead
Brandon received his B.S. and M.S. in Materials Science and Engineering from the University of Washington. Having previously conducted research on algal biomass-cement composites, Brandon's background was an ideal match for the current research being sponsored by Greener Concrete and Zeolite Composites. Brandon is pursuing his Ph.D. at the University of Washington to understand the role of clinoptilolite zeolite as a replacement for Ordinary Portland Cement (OPC) in concrete formulations. The goal of Brandon's research is to develop a technical understanding of the pozzolanic reactivity of natural zeolites, the long-term durability properties of zeolite-concrete composites, and the ability for zeolite to benefit biofouling and corrosion resistance.
D. Marcus Uhm
D. Marcus Uhm
D. Marcus Uhm
UW Undergraduate Research Assistant
Marcus is currently pursuing his undergraduate degree in Materials Science & Engineering at the University of Washington in Seattle. He graduated from Ingraham High School (class of 2023) with an IB Diploma and received several Academic Scholarships and is the recipient of many honors and awards for academic and scientific achievements. Marcus has travelled to Guatemala to work with student volunteers (from the University of Washington and the Clean Energy Institute) to donate and install solar panels/equipment on homes in remote off-grid Guatemalan villages. Marcus is on the zeolite composites research team at the University of Washington and is currently studying carbonation of cured zeolite composite concrete and is developing zeolite-based low carbon concrete formulations for 3D concrete printing applications.
Sarah Noet
D. Marcus Uhm
Sarah Noet
Business Development Manager
Sarah holds degrees in Psychology and Sociology from Western Washington University. Her diverse professional career spans several industries ranging from mental health and real estate to construction. She is dedicated to improving mental health awareness and support, and is an award-winning real estate agent. Sarah is passionate about environmental sustainability, with a particular focus on the concrete industry where she is a co-inventor of a patented concrete finishing tool.
Priscila Carrijo
Priscila Carrijo
Priscila Carrijo
Technical Sales Manager
Priscila is a Field Engineer for a leading manufacturing company in the construction industry. She provides technical support to engineers, architects, contractors and internal sales teams. Priscila holds a Master’s Degree in Civil Engineering from University of Sao Paulo, Brazil and is fluent in Portuguese. Priscila is an expert in concrete formulations and properties.
Ken Lee
Priscila Carrijo
Priscila Carrijo
Manager of Public Relations
Ken is a veteran Marketing Executive with experience in publishing, publicity, and international sales. A graduate of the USC School of Business Management, Ken provides the team with unique creative talents and is responsible for public relations, investor relations, business development and marketing.
Mike Weiss
Priscila Carrijo
Eric A. Johnson, JD
Senior Special Projects Manager
Mike brings significant experience in technology operations and engineering leadership to the team. Graduating with a degree in Japanese from San Francisco State University, Mike started his career in the Silicon Valley, building and managing the teams in charge of Hewlett Packard’s and Microsoft’s early internet datacenter operations. After a 20-year career at Microsoft, bringing products and services like Xbox and Hololens to market.
Eric A. Johnson, JD
Eric A. Johnson, JD
Eric A. Johnson, JD
Financial Advisor
Eric has lived in Seattle his entire life and graduated from University of Washington law school. He practiced law in Seattle for about 10 years, specializing in criminal defense and business litigation. Eric is a Co-Founder at Seattle Wealth Management, LLC, a SEC registered RIA firm.
Email: Eric@SeattleWM.com
Nick Lambert
Eric A. Johnson, JD
Nick Lambert
Senior VP of Sales & Marketing
Nick has spent over 15 years as a Human Capital Management Consultant/Account Executive for enterprise organizations in the Pacific Northwest. Nick has specialized in SaaS applications and outsourced services for helping organizations improve workforce efficiencies, mitigate financial risk, and improve talent acquisition and retention. Nick graduated from Washington State University with degrees in Marketing and Communication.
EMAIL: Nick@ZeoliteComposites.com
Jason Moon
Eric A. Johnson, JD
Nick Lambert
Director of Media and Public Relations
Jason's background in technology, with roles at Microsoft and Amazon, underscores his expertise in innovation and problem-solving. He is deeply committed to environmental conservation, public safety, and creating thoughtful housing solutions for Mukilteo. His forward-thinking approach emphasizes collaboration and diversity, ensuring a thriving future for Mukilteo and its surrounding communities. Jason Moon serves as the Vice President of the Mukilteo City Council, where he leads with a vision of inclusivity, sustainability, and community engagement. As a second-generation Korean American with deep roots in Snohomish County, he has dedicated his career to public service and advocating for policies that reflect the diverse needs of the community.
Other Collaborators
Aaron Celestian, Ph.D.
Dr. Celestian currently researches how minerals interact with their environments and with living things, and how those minerals can be used to solve problems like climate change, pollution, and disease. His on-going research in experimental design, real-time material characterization, synthesis & application, and th
Aaron Celestian, Ph.D.
Dr. Celestian currently researches how minerals interact with their environments and with living things, and how those minerals can be used to solve problems like climate change, pollution, and disease. His on-going research in experimental design, real-time material characterization, synthesis & application, and the functionalization of minerals is developing novel nano-crystalline Earth materials into functional materials for a wide variety of demanding applications. Prior to becoming curator of Mineral Sciences at the Natural History Museum of Los Angeles County, he was a Professor of Geology at Western Kentucky University, Director of the Advanced Materials Institute in Bowling Green, KY, affiliate scientist at the Kentucky NanoNet (a nanomaterials consortium), and VP for research & development at Terra Enviro LLC. Currently, Dr. Celestian holds adjunct teaching and research faculty positions at the University of Southern California and holds several research positions for companies interested in ion-selective separation. In addition to research, Dr. Celestian oversees the Gem & Mineral Hall at the Natural History Museum of Los Angeles and regularly develops mineral science exhibits.
Professor Nara Almeida, Ph.D.
Nara is a Doctor of Civil Engineering with an MBA in Civil Construction, a specialization in Project Management, and a Bachelor's degree in Architecture and Urban Planning. She worked as a professional architect in Brazil for eight years, designing and coordinating residential, commercial, and institutional pr
Professor Nara Almeida, Ph.D.
Nara is a Doctor of Civil Engineering with an MBA in Civil Construction, a specialization in Project Management, and a Bachelor's degree in Architecture and Urban Planning. She worked as a professional architect in Brazil for eight years, designing and coordinating residential, commercial, and institutional projects. A LEED Green Associate, she is passionate about sustainable construction materials and methods. Nara is currently an Assistant Teaching Professor at the University of Washington Tacoma (UWT), where her research focuses on pervious concrete and the use of natural-occurring and waste byproduct pozzolans as supplementary cementitious materials. She investigates how these materials can enhance concrete performance, reduce carbon emissions, and improve stormwater management, contributing to more sustainable and resilient infrastructure.
Professor Federico (Fred) Aguayo, Ph.D.
Fred is an Assistant Professor with the Department of Construction Management (CM) and an Adjunct Associate Professor with the Department of Civil and Environmental Engineering (CEE) at the University of Washington (UW). Before joining UW in September 2021, he was an Assistant Professor at Texas Stat
Professor Federico (Fred) Aguayo, Ph.D.
Fred is an Assistant Professor with the Department of Construction Management (CM) and an Adjunct Associate Professor with the Department of Civil and Environmental Engineering (CEE) at the University of Washington (UW). Before joining UW in September 2021, he was an Assistant Professor at Texas State University in San Marcos, TX, where he taught and performed research in concrete materials, durability, and sustainable infrastructure construction. Fred received his PhD in Civil Engineering from the University of Texas at Austin in 2016. He is an active member of the American Concrete Institute and ASTM International and participates in several committees related to concrete durability (ACI 201) and material science of cementitious systems (ACI 236). He primarily examines durability-related issues in cement-based materials such as corrosion, carbonation, ASR, sulfate attack, and early-age volume changes.
Alexander (Alex) Romero
Student Research Assistant
Alex is a full-time student at Green River College, pursuing his associate in science-transfer (AST) degree in Mechanical Engineering. He will transfer to UW Tacoma (UWT) in Fall 2026 to complete his bachelor’s degree in mechanical engineering. Alex is currently part of the UWT research p
Alexander (Alex) Romero
Student Research Assistant
Alex is a full-time student at Green River College, pursuing his associate in science-transfer (AST) degree in Mechanical Engineering. He will transfer to UW Tacoma (UWT) in Fall 2026 to complete his bachelor’s degree in mechanical engineering. Alex is currently part of the UWT research project team that is studying the impact of low carbon zeolite concrete composites on the hydraulic and mechanical properties of low carbon pervious concrete, including compressive strength, porosity, and permeability. The filtration capacity of pervious concrete for different types of pollutants, both with and without zeolite, is a key focus for future phases of this research project.