Christian Leu

Trionista Topco GmbH is a firm with interests in energy services. Its services include development, production and distribution of products for measurement, control of energy consumption, and services relating to the metering and billing of energy consumption data. In addition the firm's service also includes the provision of services to other businesses. The company was founded on September 16, 2013 and is headquartered in Essen, Germany.

ista International GmbH engages in the provision of energy management services. It also offers detect and protect solutions that include installation and maintenance of smoke alarm devices; and provision of leakage detection and tap maintenance and drinking water analysis services. The company was founded by Johannes Schultz and Karl Volker in 1957 and is headquartered in Essen, Germany.

Leica Geosystems AG designs and develops geospatial sensor equipment and mapping, surveying and engineering software. The firm’s products include total stations, GNSS systems, GNSS reference networks, laser scanners, laser tracker systems, mobile sensor platforms, airborne systems, machine control systems, construction total Stations and GNSS, detection systems, lasers, levels, GIS collectors, DISTO and Lino. It provides solution in the fields of construction, engineering, transportation, energy, monitoring, utilities, mining, agriculture, science and education, and sports and entertainment industry. The company was founded in 1997 and is headquartered in Heerbrugg, Switzerland.