Banjerd completed an LL.B. at Bangkok's Ramkhamhaeng University. He received an LL.M. in public law from Thammasat University, followed by a Magister Legum (LL.M.) Doktors der Rechte (Dr.jur.) from Ruhr-Universität Bochum in Germany. He returned to Thailand after completing his doctorate and now teaches administrative law and constitutional law at Thammasat University.
