Company profile


ONEJOON Inc. is an American industrial furnace, kiln and oven manufacturing company with locations in Alpharetta, GA and Oakdale, MN. As the newest member of the ONEJOON Group, we extend our product and service offerings into our North American target markets.

ONEJOON Inc. is rapidly expanding their operations to support the growing demand for high performance thermal processing equipment in North America.

Our team of highly skilled engineers is adapting our proven ONEJOON designs to meet North American regulations, norms and laws, making the implementation into your operations a seamless and successful one. To ensure availability of your ONEJOON equipment we are currently building a centralized service hub in Alpharetta, GA. It will be the base of our service technicians and engineers. To ensure short lead times customized spare and wear parts packages can be supplied from a local warehouse.

Our experienced local sales team will assist you in specifying and selecting the right equipment for your production needs.

If our standardized furnaces don’t quite fit your requirements, we will employ our global resources to engineer, design and build a tailor-made solution that perfectly suits your needs.

ONEJOON is the technology and market leader for oxidation ovens and carbonization furnaces used in the production of carbon fiber. ONEJOON also has a very strong position as a furnace supplier for cathode and anode material production in the lithium-ion battery industry.

Other key target markets include the following:

  • Hardening of blades and saw bands
  • Sintering of metals and ceramics
  • Heat treatment of aluminium wheels and structural parts
  • Powder chemistry and advanced materials
Mn Office Minnesota Office


Alpharetta, Georgia and Oakdale, Minnesota


U.S. Headquarter:
11390 Old Roswell Rd.
Suite 126
Alpharetta, GA 30009

U.S. Midwest Office:
7825 3rd Street North
Suite 206
Oakdale, MN  55128

Management Board in USA

Sung Je LEE President & CEO +82 31 2 97 05 94
André Goernhardt Managing Director/CEO +49 551 820 830 - 0
Jan-Phillip Schmiing Head of Business Segment USA Treasurer and Secretary +49 151 14 31 65 51
Flagge Deutschland 440x280
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Heat treatment plants

More than 120 years experience in industrial furnace construction

Jan-Phillip Schmiing Head of Business Segment USA +49 151 14 31 65 51