Dr. Peker received his medical degree from the Hacettepe University and graduated from the Hacettepe University Neurosurgery residency program in 1993. After working in some clinics in Ankara, Alanya and İstanbul, Dr. Peker joined the faculty of the Department of Neurological Surgery at the Marmara University in May 1999 and later was named chief of stereotactic and functional neurosurgery. He did his gamma knife radiosurgery fellowship in University of Pittsburgh Medical Center and pain surgery and movement disorder surgery fellowship in Oregon Health Sciences University. Dr Peker joined the Acibadem Health Group in 2005. He served as Professor of Neurosurgery in Acibadem University Department of Neurosurgery. He was the chief of Gamma knife radiosurgery center and Movement Disorder Surgery program.
In 2017 he joined Koç University Department of Neurosurgery. He is the Chair of Department of Neurosurgery. He is the chief of Gamma Knife Radiosurgery Center and Movement Disorder Surgery program.
His work in stereotactic radiosurgery spans the breadth of that field including studies in cerebral vascular malformations, benign and malignant brain tumors, trigeminal neuralgia, epilepsy. He performs lesion surgery and DBS surgery for movement disorders.
He is now President of Turkish Neuromodulation Society.
Dr. Peker has published 136 articles in refereed journals. He performed 194 presentations in International and National Meetings. He presented 234 conferences as a guest scientist or visiting professor.