Wolf Kleinert started his career in ultrasonic material testing in the year 1982 at the Krautkrämer Company in Cologne, Germany. He had a plurality of managerial assignments in Product-, Marketing- and Sales-Management, Intellectual Property Management as well as General Management. He was responsible for the Application Laboratory and heavily involved in the development of new probe technologies. End of 2014 Wolf retired after nearly 33 years in ultrasonic material testing.