Mehmet Ayyildiz, also known as Mariyan Milenov, was a faculty member in the  Mechatronics Engineering Department at Istanbul Bilgi University. He was currently the Head of the Mechatronics Engineering Department, Member of the Faculty Board, and Faculty Executive Board in the Faculty of Engineering and Natural Sciences at Istanbul Bilgi University. His research interests include haptics, mechatronics, robotics, and biomechanics.

Prior to joining İstanbul Bilgi University, he was employed by EnginSoft Turkey, a consulting firm in the field of simulation-based engineering and science, as a technical manager from January 2016 to July 2016. Before that, he was a design engineer at General Electric from May 2015 to January 2016. He received MS and Ph.D. degrees in mechanical engineering from Koc University in July 2011 and March 2015, respectively. He was a teaching and research assistant and a member of the Robotics and Mechatronics Laboratory at Koc University from September 2009 to March 2015. He earned his BS degree in mechanical engineering with honors from Selcuk University in June 2009. He studied at Lublin University of Technology as a part of his BS degree through Erasmus exchange in Spring 2008.

He received Teaching Excellence Awards based on the Course and Instructor Evaluation Surveys at Istanbul Bilgi University. He was awarded scholarships from the Scientific and Technological Research Council of Turkey (TUBITAK) and Koc University for his M.Sc. and Ph.D. studies. He has published peer-reviewed scientific articles in highly competitive journals and conferences. He has served as a reviewer in journals such as IEEE Transactions on Mechatronics, IEEE Transactions on HapticsMedical Engineering PhysicsJournal of the Mechanical Behavior of Biomedical Materials, and Journal of Biomechanics.

He was born in Razgrad, Bulgaria. He is married with one daughter. He knows Turkish (native), English (advanced), and German (advanced).