Dr Callejas is an Otolaryngologist Head and Neck Surgeon at The Queen Elizabeth Hospital in Adelaide, Australia, with more than a decade of focused experience in rhinology and endoscopic skull base surgery.
He completed his specialist ENT training at Pontificia Universidad Católica de Chile and further refined his subspecialty expertise through fellowships at The University of Auckland, The Ohio State University, and The University of Adelaide. He is a Fellow of the Royal Australasian College of Surgeons.
His clinical practice centers on complex frontal sinus surgery, revision and extended frontal approaches, and advanced endoscopic skull base procedures.