OUR STORY

A fourth generation driller in his family business, called D. Stewart Drilling, that has been serving the upstate New York community since 1901, Derek Stewart founded Geothermal Tech Inc. because he is a believer in green solutions. By harnessing the internal temperature of the earth to provide both heating and cooling for homes, his company has been providing full end-to-end geothermal installs for New York upstaters since 2001. With a team that has known the lay of the land for generations, they can handle everything in-house. No middle men, just expert service.

Geothermal Tech Inc. operates:

Catskills Geothermal
Catskills Well Drilling


Our Mission

Through education of the community and providing high quality service at every job, we want to help New York home owners become less reliant on fossil fuels with a stress free experience and easy transition. We believe in making natural heating & cooling systems a reality by offering geothermal systems that are accessible, affordable and top of the line - providing a truly reliable alternative to both oil heat and natural gas.


We could not be happier with our Geothermal System. Derek and his team are very knowledgeable and did a great job from start to finish.
— T. G.

Past Projects

Geothermal Tech Inc. has been servicing the Catskills and upstate New York for over 15 years. We install geothermal systems in Ulster County, Greene County, Orange County, Dutchess County, Columbia County, Schoharie County, Albany County, the Hudson Valley and more.