In 2005, Hengst founded the subsidiary companies Hengst of North America, Inc. in Camden, USA, and Hengst Filter Systems (Kunshan) Co., Ltd. in Kunshan, China.
2005 gründete Hengst die Tochtergesellschaften Hengst of North America, Inc. in Camden, USA und Hengst Filter Systems (Kunshan) Co., Ltd. in Kunshan, China.