About Our Company

Founded in 2005, Colorado Geothermal Drilling is now the leading installation contractor for geothermal systems along the Front Range of Colorado. We are a family-run and operated business, and handle both residential and commercial projects, large and small.

We have successfully completed over 600 geothermal installation projects throughout the Front Range, from new construction to retrofits of existing structures.

energy star systemWith a growing interest in renewable energy, we are committed to bringing affordable geothermal systems to all!

Why Colorado Geothermal Drilling?

With our vast knowledge of geothermal design and installation, we can provide our clients with the best energy-efficient system to fit their needs and budget. We strive to master leading-edge technology and pride ourselves on the quality of services we provide to our clients.

We offer full customization of the geothermal systems to fit your needs. Proper design and scope of a system is impacted by everything from the size or your home, to wall and roof insulation, to type, size, quality, and location of windows, among other design considerations. It is important to hire a knowledgeable geothermal contractor that can work with you, your HVAC contractor, engineer, architect or builder to meet the needs of your lifestyle and how you want to live in your home.

Using specialized equipment, our experienced team has successfully and repeatedly completed numerous drilling projects along the Front Range, and beyond. Our set-up is unique as we are able to access compact areas with our equipment, setting us apart from other drilling operations, and expanding our customer base.


Dan Rau has a Bachelor’s Degree in Mechanical Engineering and is a licensed Professional Engineer (PE). Because of Dan’s engineering background, he has a comprehensive understanding of geothermal systems and can help our clients to design the system most appropriate for their heating and cooling needs. Dan grew up on a farm in the Midwest and has a passion for enhancing and building more efficient, safe, and streamlined equipment. This in turn makes our installations require less equipment and manpower. His engineering background and equipment design and operation make him a rare occurrence in the geothermal industry. Dan is a IGSHPA Accredited Installer and Licensed with the State of Colorado Division of Water Resources.

Kari Rau executes the marketing and advertising strategy for Colorado Geothermal Drilling and collaborates in all aspects of managing a green, family-owned, small business. She is on the Steering Committee for the Brighton Business Builders, is a member of IGSHPA and The Greater Brighton Chamber of Commerce,  and often writes about geothermal and renewable energy content for media publications. She worked as an ATC in sports medicine before joining Dan and championing their renewable business.

Nick Rau is our Geothermal Field Chief and leads our onsite geothermal loop field installation.  He manages all drilling and grouting operations and assists our team with optimizing our quality and efficiency installation standards. He is originally from the Midwest and grew up on a dairy farm. He has a degree in Landscape Design and spent several years as a foreman overseeing and completing landscaping projects. Nick is a IGSHPA Accredited Installer and Licensed with the State of Colorado Division of Water Resources.

Colorado Geothermal Drilling is a member of the International Ground Source Heat Pump Association (IGSHPA) and we are IGSHPA Accredited Installers.

We are also licensed by the State of Colorado Division of Water Resources as Closed-Loop Geothermal Loop Field Installers.

CGD provides geothermal drilling services in the state of Colorado all along the Front Range (Denver, Boulder, Colorado Springs & Fort Collins).

For more information on geothermal installation services please contact Dan Rau or Kari Rau. Call us at 303.903.7081 or fill out our online request form.