From production employee to operations manager: In his 42 years at Tietjen, Mr Peter Wagner had not just experienced many things, but also been involved in many key innovations right from the start. After training as a mechanical engineer, he started at Tietjen at a time when the company had just twelve members of staff. During his rise to operations manager he has achieved a great deal along the way, and Mr Wagner is today still responsible for numerous staff and company activities, and supports Tietjen wherever he can.