HGN Hydrogeologie GmbH
- Engineering company specialized in consulting, planning and management of water, soil and environment projects.
- http://www.wasser-hgn.de

FMN communications GmbH
- Manufacturer of telephone terminal devices and subassemblies.
- http://www.fmncom.com/

IHU GmbH
- Offers a variety of environmental consulting services in the fields of hydrology, geotechnics, environmental research, and groundwater modeling.
- http://www.ihu-gmbh.com/

BIC-Nordthüringen
- Provides infrastructure and services in two attractively designed and functionally equipped buildings each with more than 2000 m² floor space. Locations in Nordhausen and Sondershausen.
- http://www.bic-nordthueringen.de/

C-Partner Systemhaus GmbH
- The system provider deals with the development of internet applications and e-commerce solutions, web design and training.
- http://www.c-partner.com/

Suedharzer Maschinenbau GmbH
- Manufacturer of wood, firewood and metal processing machines. Product range includes sawing, planes and grinding machines as well as different types of splitters.
- http://www.bgu-maschinen.de/