After completing his undergraduate and graduate education in Gazi University Faculty of Dentistry in 1993, he started his doctorate education in 1994 in Ankara University, Oral and Maxillofacial Surgery Department. Between 1994 and 2015, he worked as a Oral - Maxillofacial Surgery Specialist and Invited Lecturer at the Middle East Technical University Health Center. In 2011 he became an Associate Professor of Science. In 2015, she started to work as a faculty member at the Department of Oral and Maxillofacial Surgery at the Faculty of Dentistry of Kırıkkale University. In 2017, he was appointed as a professor at the same university.
He is currently the Professor and Head of the Department of Oral and Maxillofacial Surgery at the Faculty of Dentistry of Kırıkkale University. Dr. Önder has many scientific articles and professional memberships published in major journals. He is interested in temporomandibular joint diseases and surgery, distraction osteogenesis, orthognathic surgery, advanced implant surgery, biomaterials and trauma.