Matthias Ernst Rebellius

Siemens Industry, Inc. provides building controls, fire safety, energy and environmental solutions, and security system solutions. It offers electrical engineering services and manufactures electrical products. The firm also provides communication, transportation, and power generation systems and services. The firms divisions include building technologies, drive technologies, industry automation, industry solutions and mobility. The company was founded on July 5, 1994 and is headquartered in Buffalo Grove, IL.

Part of Siemens AG, Siemens Building Technologies AG is a Swiss company that offers energy-efficient, safe, and secure buildings and infrastructure. The company is based in Zug, Switzerland. The company acts as a trusted advisor and reliable partner, providing system integration, services, and products. Siemens also provides ways for internal and external parties to report compliance violations. The company believes that technology with purpose can solve the greatest challenges of our time and offer career opportunities to those who join their team.

Siemens Schweiz AG manufactures and markets automation, safety and security systems. It provides products and services for climate control, building & energy management, fire safety, security, lighting and facility management. The company makes HVAC control and automation products, such as actuators, thermostats, sensors and valves. Other products include fire safety (detection and evacuation systems) and security access controls (alarms, badge management and video surveillance). It also provides facility management services. The company distributes its products primarily through independent contractors and wholesalers. The company was founded in 1916 and is headquartered in Zurich, Switzerland.

Part of Symrise AG, Siemens Energy Management GmbH is a German company that engages in the management of assets. The company is based in Munich, Germany. Christian Bruch has been the CEO of the company since 2020.

Siemens Mobility GmbH (Germany) manufactures rolling stock, rail automation, electrification and traffic control systems. The company was founded by Werner von Siemens and Johann Georg Halske in 1847 and is headquartered in Munich, Germany.

Part of Siemens AG, Siemens Ltd. (Australia) is a company headquartered in Bayswater, Australia, that operates technology company.