Deltech Furnaces Logo

To sign up to receive our emails, fill in the following fields and hit submit. Thanks, and welcome!

"*" indicates required fields


55th Anniversary brings ownership change

55th Anniversary brings ownership change

After 39 years, co-owner and director of Marketing, Human Resources, and Finance, Mary Stevenson, is (mostly) retiring. Effective July 1, 2023, her responsibilities will be limited to marketing.

Calvin L Stevenson

Mary started working part-time in the family business started by Deltech’s cofounder Calvin L. Stevenson  while a graduate student, eventually becoming the CEO. She reports that over the years she did bookkeeping, janitorial services, packaging and shipping, sales, marketing, human resources, and provided some limited technical support. She remarked that wearing many hats is very typical for every small business owner she’s encountered.

Photo of Mary Stevenson





The new (sole) owner and CEO is family member J.J. Stevenson. JJ started working at Deltech part time while still in high school. He came on board full time in 2005 after completing his bachelors and masters degrees in Mechanical Engineering at the University of Colorado Denver. He became Deltech’s Engineering Manager and co-owner in 2017. His expanded management responsibilities will be in addition to his current roles in engineering, sales, and supervision of production.

Profile photo of J.J. Stevenson


Another family member, Ryan White, continues as a key contributor to sales, engineering, and quality management. Ryan, also a mechanical engineer, joined Deltech in 2017 after gaining experience with a petroleum company.

Profile photo of Ryan White

Deltech Furnaces is also very fortunate to have long-term employees in key positions in administrative services, engineering, and production. Kudos to our Administrative Services Coordinator Debbie Kuiper, Production Supervisor Bobby Duncan, Production Lead Jason Weber and Mechanical Drafter Perla Del Rio.


Deltech is currently celebrating its 55th anniversary, and we are proudly looking back at our history. For us, every furnace is a custom project because it is built to order and to suit our customer’s application. No off-the-shelf products. Being driven by the ever more sophisticated systems the scientists and engineers we serve need to accomplish their goals has meant that we offer the most up-to-date technology. We are also proud of being an ISO 9001:2015 certified company, having a UL508A compliant as certified by Intertek panel shop, having an ASME NQA1 2008 quality assurance program, and having a NIST 800:171 compliant cybersecurity program.


55th Anniversary brings ownership change

All Deltech furnace systems are designed and manufactured in the U.S.A, and shipped and installed worldwide.