Dr. Mueller received his Diploma degree in mathematics from the University of Applied Sciences, Mittweida, Germany, in 1997, a Diploma degree in electrical engineering from the University of Northumbria, Newcastle, U.K., in 1998, and a Diploma and Ph.D. degrees in mechanical engineering from the Technical University Chemnitz, Chemnitz, Germany, in 2001 and 2004, respectively. From 1989 to 1993, he did professional work as an electronic technician. From 1998 to 2008, he was a research assistant with the Institute of Mechatronics, Chemnitz. Since 2008, he has been Lecturer with the Chair of Mechanics and Robotics, University Duisburg-Essen, Germany. His research interests include dynamics and control of non-linear systems, mechanisms, robotics, parallel mechanisms, singularities, differential geometric methods, advanced simulation methods, biomechanics, microelectromechanical systems, and chaotic systems.