His clinical interests include navigated and robotic neurosurgery, endoscopic spine surgery, spinal cord stimulation, deep brain stimulation, spine tumors, and spine deformities.

Oh earned his medical degree from the Keck School of Medicine at USC in Los Angeles. He completed residency training in neurosurgery at Allegheny General Hospital in Pittsburgh, Pa., and a research fellowship in stereotactic and functional neurosurgery at the University of Toronto in Ontario, Canada. 

He is a Professor and Vice-Chair at the Department of Neurosurgery, University of California, Irvine, where he serves as director of spine services.His research interests include developing advances in robotics for neurosurgical procedures. He holds a patent for a device for the minimally invasive removal of blood clots in the brain. His research was published in prominent journals, including the Journal of Neurosurgery, Neural Plasticity, Archives of Physical Medicine, and Rehabilitation. He has served as a neurotrauma consultant with the National Football League.