The core activity of GYSTEC HV Services GmbH is the provision of professional services in the field of Gas-Insulated Switchgear (GIS), including: installation, maintenance and repair of GIS systems; handling and monitoring of SF6 gas; high-voltage testing and measurement; training and instruction of customer personnel; and inspection and maintenance of GIS systems in accordance with international standards and manufacturer's instructions. The company offers these services internationally and specializes in working with GIS systems up to 275 kV.