Holger Kau

Siewert & Kau Computertechnik GmbH engages in the distribution of information technology products. It offers hard drives, gigabit Ethernets, sound cards, storage enclosures, digital multimedia receivers and processors. The firm also provides packing, labelling, packaging, drop-shipping and imports and customs warehousing services. The company was founded in 1994 by Björn Siewert, Holger Kau and Oliver Kau and is headquartered in Bergheim, Germany.

HOB Holding GmbH is a strong partner for IT distribution, logistics, and service solutions. The private company is based in Bergheim, Germany and was founded in 2011. With a passion for IT distribution and decades of industry expertise, the German company provides specialized services to customers across ten locations. The company offers the ability to connect customers' inventory management systems with their infrastructure, providing direct access to their products and services. The CEOs are Björn Siewert, Oliver Kau, Holger Kau.

Siewert & Kau Logistik GmbH is a German company that distributes IT products. The private company is based in Bergheim, Germany. The company was founded by Björn Siewert, Oliver Kau, Holger Kau and they have been the CEOs since incorporation.

Siewert & Kau Service GmbH is a German company that provides a range of services including advertising, software development, accounting, and administrative services. The private company is based in Bergheim, Germany. The CEOs of the company are Björn Siewert, Oliver Kau, Holger Kau.

HOBID Grundbesitz GmbH is a German company that buys and sells real estate. The private company is based in Bergheim, Germany. The CEOs are Holger Kau, Olaf Karsten Strecker. The company was founded in 2019.