Bilfinger SE (previously named Bilfinger Berger AG) is a multinational company specialized in civil and industrial construction, engineering and services based in Mannheim, Germany.

Die EnBW Energie Baden-Württemberg AG ist ein börsennotiertes Energieversorgungsunternehmen mit Sitz in Karlsruhe. Das Unternehmen ist nach E.ON und RWE das drittgrößte Energieunternehmen in Deutschland.

Die Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. (Fraunhofer) ist mit rund 23.000 Mitarbeitern die größte Organisation für angewandte Forschungs- und Entwicklungsdienstleistungen in Europa.

ABB is a multinational corporation headquartered in Zurich, Switzerland, operating mainly in robotics and the power and automation technology areas.

For over 40 years BINDER is known worldwide as a specialist in drive and manufacturing technology actively for its customers.

Siemens AG is a German multinational conglomerate company headquartered in Berlin and Munich. It is the largest engineering company in Europe. The principal divisions of the company are Industry, Energy, Healthcare, and Infrastructure & Cities, which represent the main activities of the company.

Bruker Corporation is a manufacturer of scientific instruments for molecular and materials research, as well as for industrial and applied analysis.

Coherent, Inc is a company with headquarters located in Santa Clara, California, USA, with other sites located in the US, Europe, and Asia. It was founded in 1966 by Eugene Watson as a spin-off from laser company Spectra-Physics and converted to public ownership in 1970.

Flintec is a Swedish-based designer and manufacturer of load cells, force sensors and measurement systems serving a wide range of applications.

Radiall is a company that designs, develops, and manufactures connectors and associated components for use in electronic applications. The company offers interconnect components, including radio frequency/coaxial connectors and cable assemblies, antennas, fiber optic connectors and cable assemblies, microwave components and cable assemblies, microwave switches, and multipin connectors.

Ziehl-Abegg SE is a German manufacturer of fans for ventilation and air conditioning applications, as well as drive technology for elevators and motors with matching control technology. The company's headquarters are in Kuenzelsau Hohenlohe, Germany.

Thermo Fisher Scientific Inc. ist ein US-amerikanisches Technologieunternehmen. Thermo Fisher hat weltweit ca. 50.000 Mitarbeiter und einen Umsatz von 13,09 Mrd. US $.

The WeylChem Group of Companies, which Allessa also belongs to, offers Custom Manufacturing and Tolling services, Advanced Intermediates and Reagents, a range of Performance Products and Detergent Chemicals. WeylChem companies are located in Germany, France, Italy and the US.

Since 25 years elex produces customer specific electronics in Mannheim, Germany, for big players in chemical, lab and sanitary industry.

Thermokon has more than 25 years of market experience. Its core competence lies in the sensor technology for heating systems and building automation.