In 1993, after completing his master's degree at Gazi University Faculty of Dentistry, he started his doctorate education at Ankara University Department of Oral and Maxillofacial Surgery in 1994. Between 2001-2015, he worked as an Oral and Maxillofacial Surgery Specialist and Invited Lecturer at the Middle East Technical University Health Centre. In 2011, he received his "Associate Professor of Science" in the field of Oral and Maxillofacial Surgery.
In 2015, he started his academic career as an Associate Professor at Kırıkkale University Faculty of Dentistry, Department of Oral and Maxillofacial Surgery. In 2017, he received the title of Professor. In 2023, Lokman Hekim University, Faculty of Dentistry, Department of Oral, and Maxillofacial Surgery, started teaching as a Professor.
He has studies published in local and foreign journals on Tempomandilbuler joint, biomaterials, training simulators, dental implants. He is currently working as a Professor and Head of the Department of Oral, Dental and Maxillofacial Surgery at Lokman Hekim University Faculty of Dentistry. Dr. Önder has many scientific articles published in important journals in his field and is a member of professional organisations. He is currently the president of the ACBID association of the Turkiye. He is interested in temporomandibular joint diseases and surgery, orthognathic surgery, advanced implant surgery, biomaterials and trauma.