Olgun Değirmenci was born in Ankara in 1972. He graduated from Istanbul University Faculty of Law in 1995. In 2002, he became a criminal law scientist (LLM) with his thesis on Computer Crimes, and in 2006 he became a criminal law science doctor (Ph.D.) at Marmara University with his thesis on Laundering Asset Values ​​Arising from Crime. He became an associate professor of criminal and criminal procedure law in 2015 with his work on Digital Evidence in Criminal Procedure. In 2020, he was promoted to professor in the department of criminal and criminal procedure law.
He worked as a lecturer and faculty member at the National Defense University. He mainly lectured on military criminal law and disciplinary law.
Since 2016, he has been working as a faculty member in criminal and criminal procedure law at TOBB University of Economics and Technology, Faculty of Law. He teaches undergraduate, graduate and doctoral courses on criminal law, criminal procedure law, military criminal law, computer crimes, digital forensics and alternative dispute solutions in criminal procedure.
There are many scientific articles and book studies published in the fields of criminal law, international criminal law, computer crimes, international crimes, military criminal law.