About DMT Clear Gas Solutions

Upgrade with DMT

Your Local Technology Supplier

In operation since 2015, DMT Clear Gas Solutions is a leading technology supplier specializing in H₂S and CO₂ removal for biogas upgrading facilities. Based in Portland, OR, our RNG products are made locally in North America using a network of trusted partners.

We are part of a global organization with 100 employees, agents and partners spread throughout Europe, North America and Asia. Our parent company, DMT Environmental Technology, has been in operation since 1987 and is located in the Netherlands. Through this, we bring more than 30 years of experience and more than 1500 references.

Our award-winning portfolio, paired with 24/7/365 customer support, is the best the industry has to offer to companies seeking sustainable solutions. As a local total solutions provider, our customers see a profitable return on investment when upgrading with DMT.


DMT Timeline

In 2015, DMT opened its U.S. office in Portland, OR under Clear Gas Solutions (CGS) with Robert Lems as the general manager.

“We are focused on sustainable solutions that fit into a circular economy.” – Erwin Dirkse

“100% sustainability is possible. I believe that we can maintain our lifestyle without burdening the environment. The technologies that we develop at DMT contribute to creating a clear and prosperous future. I strongly believe it is our social and moral obligation to deliver technological solutions that are affordable and make a difference.

I’m very proud to work with the people at DMT. By creating efficient technologies, our customers solve environmental challenges with the highest return on investment. We create a unique business model that generates economic gain for farms, municipalities, and industrial companies as well as for the cities themselves in terms of energy security and job growth. With success like this in mind, it’s time to make RNG mainstream.” – Erwin Dirkse, managing director, DMT International

Advance your career with DMT.

Biogas upgrading (or renewable natural gas) is a new, advancing field in the United States’ renewable energy sector. Advance your career with a RNG industry leader and join DMT today. We offer a dynamic working environment with opportunities for travel, growth and development as well as a competitive market-level salary and excellent benefits, including generous PTO, health insurance and a 401(k) plan.

  • Competitive market-level salary.
  • Excellent benefits.
  • Dynamic working environment.
Careers Big 5 for Life
Advance your career with DMT.

Robert Lems, General Manager

Robert Lems, General Manager

Robert Lems, M.Sc., is a technical expert with more than 15 years of experience in biogas upgrading. As DMT’s former R&D Manager, Lems has pioneered majority of the products currently in the market. In 2015, Lems established DMT’s U.S. branch and has since oversaw more than 20 RNG projects in North America.

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