The trained radio and television technician founded the company Road Sound Rental in Lohne (Oldenburg) at the age of 16 together with other partners. This was followed by several years in the field of safety technology, installation and radio operation. After several in-house developments, he founded Connex GmbH in 1990 with a partner, which today employs around 30 people. 1996 followed the first products and patents in the field of fiber optic technology for event technology. In order to make "Rock'n'Roll" capable of doing business, Rottinghaus has been actively involved in the VPLT for many years. Rottinghaus is also a member of the standards committees of AES, DIN and PLASA.