Frank Rothäusler

Open Grid Europe GmbH provides natural gas transmission services. The firm's activities include design and construction of pipelines from conceptual design, project management, and engineering to implementation operation of the pipeline system. It offers services including maintenance and repair, as well as control and monitoring of the network and storage facilities; provision of capacity management services that include capacity assessment and development of new gas industry standards; marketing of the capacities and support of customers; and quantity determination, and billing services. The company was founded in 2004 and is headquartered in Essen, Germany.

Vier Gas Transport GmbH engages in the provision of natural gas and gas transmission network services. The firm focuses on the acquisition, holding, and management of interests in gas transmission assets through its investments and operates as a transmission system operator. The company was founded on January 10, 2012 and is headquartered in Essen, Germany.